Easing the Difficulty Curve

[UltimateLemmings]

So infamously after 35 years now we all know how ridiculous the original jumps in difficulty are. Perhaps no more infamous than going from the final Tame levels in Oh No! to the first couple of Crazy ones. We know that the DMA level devs would one up each other in challenging each other, and the novice player kind of got lost in the wash, with no real intermediate gradient to speak of.

I'm sure there have been plenty of community efforts and fan-levels to try and fill that gap, but with my new Ultimate Lemmingsl project, I thought I'd take a crack at it myself. My girlfriend who have never played a Lemmings game in her life, would double up in laughter and joy at playing the fun and reasonably challenging levels, but would hit a hard frustration wall and give up on wanting to play. So this is for her.

Because Ultimate Lemmings aims to include every official and unofficial 2D lemmings level, I have a wealth to choose from. In validating the levels so they are all solvable under my new modern Swift engine, I also ran an ML pass on them to assign a difficulty score. From this I compiled a pack of 292 levels (roughly the amount across Lemmings, Oh No & Xmas lemmings) across all classic levels, including fan levels to create a smooth difficulty and teaching gradient across the levels, regardless of their origin.

This will be the default mode to play Ultimate Lemmings, so I want to get this right. Have a look at the list and let me know if you think I got it right:

Spoiler

Oh My! All Lemmings!

A selective learning journey of 292 levels. The complete library and original campaigns remain available separately.

The first eight lessons introduce each basic skill once. Most of the following teaching work is in combinations, sequences and intermediate strategy. Every selected level has a distinct objective. Two-player levels and repeated port puzzles are excluded.

Official levels take priority where they fit the lesson and difficulty. The corpus includes all Classic, Oh No! and seasonal levels. This journey uses Classic mechanics only.

This is a replay-informed candidate curriculum. The objectives and difficulty curve still need novice playtesting. It is not a certified wall-free path.

Full order

Fun (8 lessons)

• 1. Just dig! — Lemmings. First assignment of the digger skill.
  
• 2. Floating Down! — Holiday cLemmings Frost. First assignment of the floater skill.
  
• 3. Climin' Death Mountain — TWPAK00. First assignment of the climber skill.
  
• 4. Mienrs <--- lol, typo — Ji Hoons Lemmings Remake Heaven. First assignment of the miner skill.
  
• 5. Blow Down! — Lemmings Plus DOS Project Mild. First assignment of the bomber skill.
  
• 6. You need bashers this time — Lemmings. First assignment of the basher skill.
  
• 7. The Broken Stair — KillerMasters Lemmings 1 Tame. First assignment of the builder skill.
  
• 8. Nuclear War on the dance floor — joem7. First assignment of the blocker skill.
  

Intermediate (160 lessons)

• 9. Block and Dig — brickpk2. Assign blocker and digger to separate workers without changing their skills.
  
• 10. Lemmings For Presidents! — Oh No! More Lemmings. Assign basher and miner to separate workers without changing their skills.
  
• 11. A task for blockers and bombers — Lemmings. Change the same worker from blocker to bomber in a winning route.
  
• 12. Build a Bridge — JM04. Assign blocker and builder to separate workers without changing their skills.
  
• 13. Thunder-Lemmings are go! — Oh No! More Lemmings. Assign basher and builder to separate workers without changing their skills.
  
• 14. Floating Lemming Flurry — Holiday Lemmings 1993. Change the same worker from floater to basher in a winning route.
  
• 15. Blockers can block others — Deceits Lemmings Extras. Change the release rate while preparing a route.
  
• 16. Lemming Snowfall — Holiday Lemmings 1993. Change the same worker from basher to builder in a winning route.
  
• 17. At Home in a Cave — Holiday Lemmings 1993. Change the same worker from digger to basher in a winning route.
  
• 18. It'll be Comin' Round the Mtn. — Oh No More cLemmings Tame. Change the same worker from miner to builder in a winning route.
  
• 19. Lost something? — Lemmings. Worker roles: basher; builder; miner.
  
• 20. Not as complicated as it looks — Lemmings. Change the same worker from builder to basher in a winning route.
  
• 21. The Undiscovered Country — Holiday Lemmings 1993. Assign digger and miner to separate workers without changing their skills.
  
• 22. Custom built for Lemmings — Oh No! More Lemmings. Worker roles: basher + builder. Job changes: basher → builder.
  
• 23. Jungle!! — CRISFN01. Worker roles: blocker + bomber; builder. Job changes: blocker → bomber.
  
• 24. Heading on in... — Lemmings Plus DOS Project Mild. Worker roles: builder; digger. Also practise release-rate-manipulation.
  
• 25. Test map — Orig Extra Levels. Worker roles: digger + miner. Job changes: digger → miner. Also practise release-rate-manipulation.
  
• 26. Create & Remove Collection — KillerMasters Lemmings 1 Tame. Worker roles: basher; builder. Also practise release-rate-manipulation.
  
• 27. Lemming sanctuary in sight — Lemmings. Manage two working regions in one route.
  
• 28. Be RiGhT bAcK! — Oh No More cLemmings Tame. Worker roles: builder; miner. Also practise release-rate-manipulation.
  
• 29. With Lemmings on Top — cLemmings Fun. Worker roles: basher + digger. Job changes: basher → digger. Also practise release-rate-manipulation.
  
• 30. BashintheDirectionoftheArrows — PSP Special 1 10 of 36. Worker roles: basher; basher + builder. Job changes: builder → basher. Also practise release-rate-manipulation.
  
• 31. Bridge Across, Mine Through — PSP Special 1 10 of 36. Reuse a worker by returning to an earlier job after a different assignment.
  
• 32. Avoid the Fall ! — Pieuws Lemmings 2007 Peace. Worker roles: basher + digger. Job changes: digger → basher. Also practise release-rate-manipulation.
  
• 33. 100% Pure Woven Lemming — EMPACK. Worker roles: basher; basher + miner. Job changes: basher → miner. Also practise release-rate-manipulation.
  
• 34. Dying Not Reccomended — Lemmings Plus DOS Project Mild. Worker roles: basher + digger; digger. Job changes: basher → digger. Also practise release-rate-manipulation.
  
• 35. Rising to Paradise — Pieuws Lemmings 2007 Peace. Worker roles: basher; basher + builder; builder. Job changes: basher → builder. Also practise release-rate-manipulation.
  
• 36. Float and Bomb — brickpk1. Worker roles: bomber; floater. Also practise release-rate-manipulation.
  
• 37. Merry Lemmings — Van Clan Tame. Change the same worker from blocker to miner in a winning route.
  
• 38. Value each moment — Genesis Taxing. Worker roles: bomber; builder. Also practise release-rate-manipulation.
  
• 39. Lake in the Cavern — CPs Level Pack. Worker roles: basher + bomber; bomber. Job changes: basher → bomber. Also practise release-rate-manipulation.
  
• 40. Down The Wall — Lemmings Plus DOS Project Wimpy. Worker roles: basher; basher + digger. Job changes: digger → basher. Also practise release-rate-manipulation.
  
• 41. Let's go to the moon! — Genesis Tricky. Worker roles: builder + miner. Job changes: miner → builder. Also practise release-rate-manipulation.
  
• 42. The metal walkway — ANTHPCK1. Change a worker's job and control the flow of followers.
  
• 43. A toe — Level Design Game 03. Worker roles: blocker; miner. Also practise release-rate-manipulation.
  
• 44. It is impossible to do? — CRISFN04. Worker roles: basher + builder; builder. Job changes: basher → builder. Also practise release-rate-manipulation.
  
• 45. Float and Block — brickpk1. Worker roles: blocker + floater; floater. Job changes: floater → blocker. Also practise release-rate-manipulation.
  
• 46. Welcome Back! — KillerMasters Lemmings 2 Tame. Worker roles: basher; miner. Also practise release-rate-manipulation.
  
• 47. Symmetry — EMPACK. Worker roles: blocker; digger. Also practise release-rate-manipulation.
  
• 48. Block and Bash — brickpk2. Worker roles: basher; blocker. Also practise release-rate-manipulation.
  
• 49. You Want Me To Go Where??? — Van Clan Tame. Worker roles: basher + builder. Job changes: basher → builder. Also practise release-rate-manipulation.
  
• 50. A Trap is a trap. — Genesis Present. Worker roles: blocker; bomber. Also practise release-rate-manipulation.
  
• 51. Don't leave any Lemmings — Genesis Tricky. Worker roles: bomber; bomber + builder; builder. Job changes: builder → bomber. Also practise release-rate-manipulation.
  
• 52. Mind the step..... — Lemmings. Plan a three-skill sequence on one worker: basher, builder, digger.
  
• 53. You Live and Lem — Lemmings. Worker roles: basher + builder; miner. Job changes: basher → builder.
  
• 54. That, Though, Is a Lemming — Holiday cLemmings Frost. Worker roles: digger + miner; miner. Job changes: digger → miner. Also practise release-rate-manipulation.
  
• 55. Just When You Think You Know! — Lemmings Plus DOS Project Wimpy. Worker roles: blocker + bomber; builder + digger. Job changes: blocker → bomber; digger → builder.
  
• 56. An "l" to serch — The lemming google pack. Change the same worker from builder to climber in a winning route.
  
• 57. 4 Pixels (or so) from Victory — ISteve03. Give a permanent skill to one worker while other workers modify the route.
  
• 58. 32 Lemmings Below Zero — Holiday Lemmings 1993. Worker roles: builder; builder + digger; builder + miner. Job changes: digger → builder; miner → builder.
  
• 59. The Great Lemming Road — Oh No More cLemmings Tame. Plan a three-skill sequence on one worker: basher, builder, miner.
  
• 60. Climb and Block — brickpk1. Worker roles: blocker + climber; climber. Job changes: climber → blocker. Also practise release-rate-manipulation.
  
• 61. Terrorist Attack — Pieuws Lemmings 2007 Artful. Worker roles: basher; bomber. Also practise release-rate-manipulation.
  
• 62. Take good care of my Lemmings — Lemmings. Worker roles: basher; builder. Also practise multiple-worker-coordination.
  
• 63. Careless clicking costs lives — Lemmings. Worker roles: basher; basher + builder. Job changes: basher → builder. Also practise multiple-worker-coordination.
  
• 64. Tricky Hit — Lemmings Plus DOS Project Mild. Worker roles: basher + digger + miner. Job changes: basher → miner; digger → basher. Three-step plans: digger → basher → miner. Also practise release-rate-manipulation.
  
• 65. We want to escape! — KillerMasters Lemmings 2 Tame. Worker roles: basher; basher + builder; blocker. Job changes: builder → basher. Also practise release-rate-manipulation.
  
• 66. Subterranean Exit — Pieuws Lemmings 2007 Peace. Worker roles: bomber; bomber + miner. Job changes: miner → bomber. Also practise release-rate-manipulation.
  
• 67. If only they could fly — Lemmings. Worker roles: builder + climber + floater; digger. Job changes: climber → floater; floater → builder. Three-step plans: climber → floater → builder.
  
• 68. LemEdit generated Level — ssam1221s Lemmings Tame. Worker roles: basher + blocker; builder. Job changes: basher → blocker. Also practise release-rate-manipulation.
  
• 69. Climb and Build — brickpk1. Worker roles: builder + climber; climber. Job changes: climber → builder. Also practise release-rate-manipulation.
  
• 70. Steel Block Party — Holiday Lemmings 1994. Worker roles: basher; builder + digger. Job changes: digger → builder.
  
• 71. The gauntlet — Giga pack 08. Worker roles: builder; builder + digger; digger. Job changes: digger → builder. Also practise release-rate-manipulation.
  
• 72. The waterfall — CRISFN01. Worker roles: digger + floater; floater. Job changes: floater → digger. Also practise release-rate-manipulation.
  
• 73. Gather round and break away — PSP Special 27 36. Worker roles: basher; blocker; builder. Also practise release-rate-manipulation.
  
• 74. The abyss — CRISFN03. Worker roles: blocker; builder. Also practise multiple-worker-coordination.
  
• 75. Crematory Chamber — cLemmings Fun. Worker roles: builder + digger; builder + miner. Job changes: builder → miner; digger → builder. Also practise release-rate-manipulation.
  
• 76. Lemm Of All Trades — TWPAK12. Plan a three-skill sequence on one worker: builder, climber, floater.
  
• 77. The Steel Mines of Kessel — Lemmings. Worker roles: blocker + builder; bomber; builder. Job changes: blocker → builder; builder → blocker.
  
• 78. Let's go camping. — Oh Yes! More Lemmings!. Change the same worker from digger to builder in a winning route.
  
• 79. Level 01.lvl — Amiga Demo. Worker roles: basher + builder; builder; builder + digger. Job changes: builder → basher; digger → builder. Also practise release-rate-manipulation.
  
• 80. King of Lemmings — Genesis Present. Worker roles: basher + builder; builder. Job changes: basher → builder; builder → basher. Also practise release-rate-manipulation.
  
• 81. Impassable — JM12. Worker roles: basher + builder; builder; digger. Job changes: basher → builder. Also practise release-rate-manipulation.
  
• 82. Salvage boat — Genesis Tricky. Worker roles: basher; builder; builder + miner. Job changes: builder → miner. Also practise release-rate-manipulation.
  
• 83. Tea time in the ball country — Genesis Fun. Worker roles: basher; basher + digger; builder. Job changes: digger → basher. Also practise release-rate-manipulation.
  
• 84. Guess The Game — TWPAK10. Worker roles: basher; basher + builder + miner; builder. Job changes: basher → builder; builder → miner. Three-step plans: basher → builder → miner. Also practise release-rate-manipulation.
  
• 85. Satan Loves You — TWPAK01. Worker roles: bomber + climber; builder. Job changes: climber → bomber. Also practise release-rate-manipulation.
  
• 86. A to B — PSP Special 11 26 of 36. Worker roles: basher + climber + floater; climber + floater. Job changes: climber → floater; floater → basher. Three-step plans: climber → floater → basher. Also practise release-rate-manipulation.
  
• 87. Just four in each room — CRISFN09. Worker roles: basher; basher + bomber; bomber. Job changes: basher → bomber. Also practise multiple-worker-coordination.
  
• 88. No Problemming! — Oh No! More Lemmings. Change a worker's job while managing another working region.
  
• 89. Tightrope City — Lemmings. Worker roles: basher; basher + digger; blocker; builder. Job changes: digger → basher.
  
• 90. Many Lemmings make level work — Oh No! More Lemmings. Assign bomber and builder to separate workers without changing their skills.
  
• 91. Float and Dig — brickpk1. Change the same worker from miner to floater in a winning route.
  
• 92. Get up, up, up! — Lemmings Plus DOS Project Wimpy. Worker roles: basher; basher + builder; builder. Job changes: basher → builder; builder → basher.
  
• 93. Lemming Snowjourn — Holiday Lemmings 1993. Worker roles: basher + digger. Job changes: digger → basher.
  
• 94. The lemming paradox — LEVIPAK3. Worker roles: basher + builder + digger. Job changes: basher → builder; builder → digger; digger → basher. Three-step plans: basher → builder → digger; builder → digger → basher. Also practise release-rate-manipulation.
  
• 95. Clouds of Lemmings — Holiday Lemmings 1993. Use a blocker while two terrain-changing skills prepare the route.
  
• 96. Underground Exit — Pieuws Lemmings 2007 Artful. Worker roles: basher + builder + digger; builder. Job changes: basher → digger; digger → builder. Three-step plans: basher → digger → builder.
  
• 97. Climb and Bash — brickpk1. Worker roles: basher + climber; climber. Job changes: climber → basher. Also practise release-rate-manipulation.
  
• 98. Death Row — Lemmings Plus DOS Project PSYCHO. Worker roles: basher + digger; builder; digger. Job changes: digger → basher.
  
• 99. Turn around and look. — Oh Yes! More Lemmings!. Worker roles: builder + miner. Job changes: miner → builder.
  
• 100. Six Feet Under — Lemmings Plus DOS Project Medi. Worker roles: blocker + bomber; bomber. Job changes: blocker → bomber. Also practise release-rate-manipulation.
  
• 101. Iron Industry — Pieuw01. Plan a three-skill sequence on one worker: basher, digger, miner.
  
• 102. Float and Build — brickpk1. Worker roles: builder + floater; floater. Job changes: floater → builder. Also practise release-rate-manipulation.
  
• 103. Freedom of the Lemmings — Deceits Lemmings Fun. Worker roles: basher; basher + floater; blocker. Job changes: basher → floater. Also practise release-rate-manipulation.
  
• 104. Pink pyramid — CRISFN14. Worker roles: basher + builder + digger. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise release-rate-manipulation.
  
• 105. The crystal caverns — CRISFN11. Change the same worker from basher to digger in a winning route.
  
• 106. It's...... FACE?? — KillerMasters Lemmings 1 Tame. Worker roles: basher + builder; builder; miner. Job changes: basher → builder.
  
• 107. Make a choice — Pieuws Lemmings 2007 Awkward. Change the same worker from climber to bomber in a winning route.
  
• 108. Have a Pleasant Journey ! — Pieuws Lemmings 2007 Artful. Worker roles: bomber; miner. Also practise release-rate-manipulation.
  
• 109. Fun For The Whole Family! — TWPAK08. Worker roles: builder; builder + miner. Job changes: builder → miner. Also practise release-rate-manipulation.
  
• 110. The Emerald Grotto — Pieuws Lemmings 2007 Peace. Worker roles: blocker; blocker + bomber; blocker + builder; builder. Job changes: blocker → bomber; builder → blocker. Also practise release-rate-manipulation.
  
• 111. Lemming Friendly — Oh No! More Lemmings. Worker roles: basher + builder. Job changes: basher → builder; builder → basher. Also practise release-rate-manipulation.
  
• 112. Yo-yo Lem-lem — Holiday Lemmings 1993. Complete a short route with higher measured resource pressure.
  
• 113. Snow Way! — TWPAK04. Worker roles: builder + digger. Job changes: digger → builder. Also practise release-rate-manipulation.
  
• 114. Go out for a walk? — Genesis Tricky. Worker roles: bomber + climber; digger. Job changes: climber → bomber. Also practise release-rate-manipulation.
  
• 115. The great escape — Conway07. Worker roles: blocker + builder; bomber; bomber + builder. Job changes: blocker → builder; bomber → builder; builder → blocker. Also practise release-rate-manipulation.
  
• 116. Toy Train — KillerMasters Lemmings 1 Tame. Worker roles: basher + digger; builder; builder + digger. Job changes: basher → digger; digger → basher; digger → builder. Also practise release-rate-manipulation.
  
• 117. Starry Level — EMPACK. Worker roles: basher + builder; builder; builder + miner. Job changes: basher → builder; builder → miner. Also practise release-rate-manipulation.
  
• 118. ============Pipeline============ — TWPAK01. Worker roles: basher; basher + builder. Job changes: basher → builder; builder → basher. Also practise multiple-worker-coordination.
  
• 119. The Strange Relict of Rhodes — Pieuws Lemmings 2007 Peace. Worker roles: basher + builder; basher + miner. Job changes: basher → builder; basher → miner. Also practise release-rate-manipulation.
  
• 120. What comes down must go up. — QBeez06. Worker roles: basher + digger; blocker; builder + digger. Job changes: digger → basher; digger → builder.
  
• 121. The Iron Puzzle — TimballistoPack1. Worker roles: basher; basher + builder; builder. Job changes: builder → basher. Also practise multiple-worker-coordination.
  
• 122. The Lemmyrinth — MazuLems 02. Change the same worker from climber to builder in a winning route.
  
• 123. Bash and Dig — brickpk2. Worker roles: basher; digger. Also practise release-rate-manipulation.
  
• 124. Down And Out Lemmings — Oh No! More Lemmings. Plan a three-skill sequence on one worker: blocker, digger, miner.
  
• 125. Float and Bash — brickpk1. Worker roles: basher + floater; floater. Job changes: floater → basher. Also practise release-rate-manipulation.
  
• 126. Gone With The Lemming — Oh No! More Lemmings. Worker roles: basher + digger + miner. Job changes: digger → miner; miner → basher; miner → digger. Three-step plans: digger → miner → basher.
  
• 127. Bitter Lemming — Lemmings. Worker roles: basher + builder + digger + floater; floater. Job changes: basher → builder; digger → basher; floater → digger. Three-step plans: digger → basher → builder; floater → digger → basher.
  
• 128. I am A.T. — Oh Yes! More Lemmings!. Worker roles: builder + digger; digger. Job changes: digger → builder. Also practise release-rate-manipulation.
  
• 129. Lemming Tracks in the Snow! — Holiday Lemmings 1993. Worker roles: basher; blocker; miner. Also practise multiple-worker-coordination.
  
• 130. The pit of doom — CRISFN13. Worker roles: blocker + bomber; builder. Job changes: blocker → bomber. Also practise release-rate-manipulation.
  
• 131. Maniacal Lemmings — cLemmings Tricky. Worker roles: basher + builder; blocker; builder. Job changes: builder → basher. Also practise release-rate-manipulation.
  
• 132. Lovely jubilee — Genesis Tricky. Worker roles: basher + miner; bomber. Job changes: miner → basher. Also practise release-rate-manipulation.
  
• 133. Above The Pepsi Max.ini — grams88. Change the same worker from builder to floater in a winning route.
  
• 134. Save the Lemmings with Floaters — PSP Special 1 10 of 36. Change the same worker from climber to floater in a winning route.
  
• 135. Easy when you know how — Lemmings. Worker roles: basher; basher + builder + digger; basher + digger. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise multiple-worker-coordination.
  
• 136. Twice the same? — geooPk1. Worker roles: bomber + builder; builder. Job changes: builder → bomber. Also practise multiple-worker-coordination.
  
• 137. A Giant Leap for Lemmingkind — MARTPCK1. Worker roles: blocker + bomber; bomber; builder. Job changes: blocker → bomber. Also practise release-rate-manipulation.
  
• 138. Farewell, My Lemming — Lemmings Plus DOS Project Mild. Worker roles: basher + builder; builder; builder + digger. Job changes: basher → builder; builder → basher; digger → builder. Also practise multiple-worker-coordination.
  
• 139. It`s a trade off — Oh No! More Lemmings. Worker roles: builder; digger; miner. Also practise release-rate-manipulation.
  
• 140. Meeting Adjourned — Oh No! More Lemmings. Worker roles: basher; basher + builder; digger. Job changes: basher → builder. Also practise multiple-worker-coordination.
  
• 141. Dead Lemmings Tell no Tales — cLemmings Tricky. Worker roles: builder; builder + digger. Job changes: digger → builder. Also practise release-rate-manipulation.
  
• 142. We are now at LEMCON ONE — Lemmings. Worker roles: basher; builder; builder + digger; digger. Job changes: digger → builder. Also practise multiple-worker-coordination.
  
• 143. Cloud-Covered Stalactite — Pieuws Lemmings 2007 Awkward. Worker roles: basher; basher + builder; bomber. Job changes: basher → builder. Also practise release-rate-manipulation.
  
• 144. Bridge over the iced water — JANNPCK1. Worker roles: basher + digger; bomber. Job changes: digger → basher. Also practise release-rate-manipulation.
  
• 145. Out of BASHERS??? — CRISFN03. Change the same worker from builder to miner in a winning route.
  
• 146. Lock up your Lemmings — Lemmings. Worker roles: builder + digger; digger. Job changes: builder → digger; digger → builder. Also practise multiple-worker-coordination.
  
• 147. Call in the bomb squad — Lemmings. Worker roles: blocker + builder; bomber; bomber + builder; builder. Job changes: builder → blocker; builder → bomber. Also practise multiple-worker-coordination.
  
• 148. Compression Method X — Yawg05. Worker roles: basher + builder + digger; builder. Job changes: basher → digger; digger → builder. Three-step plans: basher → digger → builder. Also practise release-rate-manipulation.
  
• 149. Loop the loop! — unfinisd. Worker roles: basher; basher + builder + digger; basher + digger; builder. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise release-rate-manipulation.
  
• 150. A TOWERING PROBLEM — Oh No! More Lemmings. Worker roles: bomber; bomber + builder; bomber + climber; builder. Job changes: builder → bomber; climber → bomber. Also practise release-rate-manipulation.
  
• 151. The Long Way Around — Holiday Lemmings 1993. Worker roles: basher + builder; blocker. Job changes: basher → builder; builder → basher. Also practise release-rate-manipulation.
  
• 152. Rainbow Island — Lemmings. Worker roles: basher; blocker + builder; builder. Job changes: builder → blocker. Also practise multiple-worker-coordination.
  
• 153. Snow Lev 5 — ANTHPCK4. Worker roles: builder; builder + climber; builder + digger. Job changes: climber → builder; digger → builder. Also practise multiple-worker-coordination.
  
• 154. Time to get up! — Lemmings. Worker roles: bomber + builder; bomber + builder + climber; builder. Job changes: builder → bomber; climber → builder. Three-step plans: climber → builder → bomber. Also practise multiple-worker-coordination.
  
• 155. A Block from Home — Holiday Lemmings 1993. Worker roles: basher + builder + digger; builder. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise multiple-worker-coordination.
  
• 156. Luvly Jubly — Lemmings. Worker roles: basher + miner; bomber. Job changes: miner → basher.
  
• 157. Sacrifice — ssam1221s Lemmings Tame. Worker roles: blocker + bomber. Job changes: blocker → bomber. Also practise release-rate-manipulation.
  
• 158. Use The Pen!!! — Lemmings Plus DOS Project Danger. Worker roles: basher + builder + climber. Job changes: basher → builder; climber → basher. Three-step plans: climber → basher → builder. Also practise release-rate-manipulation.
  
• 159. PiPeLiNe PaRaLLeL — Deceits Lemmings Tricky. Worker roles: builder; builder + digger. Job changes: digger → builder. Also practise multiple-worker-coordination.
  
• 160. Some Kind Of Lemming — Lemmings Plus DOS Project Danger. Worker roles: basher + builder; blocker; builder + miner; miner. Job changes: basher → builder; miner → builder.
  
• 161. Lemming Head — Oh No! More Lemmings. Worker roles: blocker; blocker + bomber; builder. Job changes: blocker → bomber. Also practise release-rate-manipulation.
  
• 162. Going up....... — Lemmings. Worker roles: basher + builder; builder. Job changes: basher → builder; builder → basher. Also practise multiple-worker-coordination.
  
• 163. Take new Lemmings! — Lemmy556 More levels. Worker roles: builder + floater; climber; floater. Job changes: floater → builder. Also practise release-rate-manipulation.
  
• 164. Tunneling under — ANTHPCK5. Worker roles: basher; basher + digger + miner; digger. Job changes: basher → digger; miner → basher. Three-step plans: miner → basher → digger. Also practise release-rate-manipulation.
  
• 165. Livin` On The Edge — Lemmings. Worker roles: basher; basher + builder; builder. Job changes: basher → builder; builder → basher. Also practise multiple-worker-coordination.
  
• 166. The end — Pieuws Lemmings 2007 Awkward. Worker roles: basher + builder; bomber; builder. Job changes: basher → builder; builder → basher. Also practise multiple-worker-coordination.
  
• 167. A long way to go — Giga pack 09. Worker roles: basher + builder + climber; builder. Job changes: basher → climber; climber → builder. Three-step plans: basher → climber → builder. Also practise multiple-worker-coordination.
  
• 168. Romeo n Juliet — Deceits Lemmings Fun. Worker roles: basher + builder; builder + floater. Job changes: basher → builder; builder → basher; floater → builder. Also practise multiple-worker-coordination.
  

Difficult (90 lessons)

• 169. The Boiler Room — Lemmings. Worker roles: builder + climber; builder + climber + floater; climber. Job changes: builder → climber; builder → floater; floater → builder. Three-step plans: floater → builder → climber.
  
• 170. Dangerzone — Oh No! More Lemmings. Manage several changes of job on one worker.
  
• 171. If at first you don`t succeed.. — Lemmings. Worker roles: basher + builder + digger; digger. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder.
  
• 172. Flow Control — Oh No! More Lemmings. Combine timing-sensitive assignments with release-rate control.
  
• 173. The Wrath of Lem — Holiday Lemmings 1993. Worker roles: basher + builder; builder. Job changes: basher → builder.
  
• 174. Konbanwa Lemming san — Lemmings. Worker roles: blocker; builder + floater + miner; digger. Job changes: floater → builder; miner → floater. Three-step plans: miner → floater → builder.
  
• 175. Peak of Performance — Holiday Lemmings 1994. Organise a route using four familiar skills.
  
• 176. Train your body — Oh Yes! More Lemmings!. Worker roles: basher; basher + builder + digger; digger. Job changes: basher → builder; builder → basher; digger → basher. Three-step plans: digger → basher → builder.
  
• 177. Anxiety — Oh Yes! More Lemmings!. Worker roles: builder; builder + miner; miner. Job changes: builder → miner; miner → builder. Also practise release-rate-manipulation.
  
• 178. Two heads are better... — Oh Yes! More Lemmings!. Worker roles: bomber + climber; climber + floater. Job changes: climber → bomber; climber → floater.
  
• 179. The Final Frontier — Holiday Lemmings 1993. Worker roles: blocker; blocker + bomber + builder; builder. Job changes: blocker → bomber; builder → blocker. Three-step plans: builder → blocker → bomber. Also practise release-rate-manipulation.
  
• 180. Tribute to M.C.Escher — Lemmings. Worker roles: basher + builder + floater; builder. Job changes: builder → basher; builder → floater; floater → builder. Three-step plans: floater → builder → basher. Also practise multiple-worker-coordination.
  
• 181. Maybe not such a doddle — Holiday Lemmings 1994. Worker roles: blocker; builder; digger + miner. Job changes: digger → miner. Also practise multiple-worker-coordination.
  
• 182. Let's be careful out there — Lemmings. Worker roles: builder; builder + digger + floater; floater; floater + miner. Job changes: digger → floater; floater → builder; miner → floater. Three-step plans: digger → floater → builder. Also practise multiple-worker-coordination.
  
• 183. Have an ice day — Oh No! More Lemmings. Worker roles: basher + builder + digger. Job changes: basher → builder; builder → basher; digger → builder. Three-step plans: digger → builder → basher. Also practise release-rate-manipulation.
  
• 184. This should be a doddle! — Lemmings. Manage a route with higher measured coordination demands.
  
• 185. Lemmings in the attic — Lemmings. Worker roles: basher; basher + builder + climber + miner; builder. Job changes: basher → builder; builder → basher; builder → miner; climber → builder. Three-step plans: basher → builder → miner; climber → builder → basher. Also practise multiple-worker-coordination.
  
• 186. Perseverance — Lemmings. Combine four skills under high measured resource pressure.
  
• 187. The Lemming Learning Curve — Oh No! More Lemmings. Worker roles: basher; builder; builder + miner; climber. Job changes: miner → builder. Also practise multiple-worker-coordination.
  
• 188. The Great Lemming Caper — Lemmings. Worker roles: basher + builder; basher + climber + floater. Job changes: basher → climber; builder → basher; floater → basher. Three-step plans: floater → basher → climber. Also practise multiple-worker-coordination.
  
• 189. Triple Trouble — Lemmings. Worker roles: basher + builder + climber; builder; builder + climber; digger. Job changes: builder → basher; climber → builder. Three-step plans: climber → builder → basher. Also practise multiple-worker-coordination.
  
• 190. Watch right or left (Part two) — Oh Yes! More Lemmings!. Worker roles: basher + bomber + builder + digger; bomber. Job changes: basher → bomber; basher → builder; builder → basher; digger → basher. Three-step plans: builder → basher → bomber; digger → basher → builder. Also practise release-rate-manipulation.
  
• 191. No world without you — Oh Yes! More Lemmings!. Worker roles: basher + builder + digger; builder + climber. Job changes: basher → builder; basher → digger; climber → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise multiple-worker-coordination.
  
• 192. Rules to fall — Oh Yes! More Lemmings!. Worker roles: digger + floater; floater. Job changes: digger → floater.
  
• 193. Plethora of Presents — Holiday Lemmings 1994. Worker roles: basher; basher + builder; miner. Job changes: basher → builder.
  
• 194. Lemmings Up High — Holiday Lemmings 1993. Worker roles: basher + builder; builder. Job changes: builder → basher. Also practise release-rate-manipulation.
  
• 195. Undercover Lemming — Oh No! More Lemmings. Worker roles: basher + digger + miner. Job changes: basher → miner; digger → miner; miner → basher; miner → digger. Three-step plans: basher → miner → digger; digger → miner → basher.
  
• 196. DON`T PANIC — Oh No! More Lemmings. Worker roles: basher + builder + digger. Job changes: basher → builder; builder → basher; builder → digger. Three-step plans: basher → builder → digger. Also practise release-rate-manipulation.
  
• 197. Suicidal Tendencies — Oh No! More Lemmings. Worker roles: blocker; blocker + bomber; builder + miner. Job changes: blocker → bomber; builder → miner. Also practise release-rate-manipulation.
  
• 198. Lemming about town — Oh No! More Lemmings. Combine a long single-worker sequence with a restricted skill budget.
  
• 199. Five Alive — Oh No! More Lemmings. Worker roles: bomber; builder; climber + miner; floater. Job changes: climber → miner.
  
• 200. Haunted botanical garden — Oh Yes! More Lemmings!. Worker roles: builder; digger; miner. Also practise multiple-worker-coordination.
  
• 201. Every Lemming for himself!!! — Lemmings. Worker roles: basher; bomber + builder; builder + climber. Job changes: bomber → builder; climber → builder. Also practise multiple-worker-coordination.
  
• 202. It's Boxing Day! — Holiday Lemmings 1994. Worker roles: basher + builder; basher + digger. Job changes: builder → basher; digger → basher. Also practise release-rate-manipulation.
  
• 203. Hunt the Nessy.... — Lemmings. Worker roles: basher + builder + miner; builder + digger. Job changes: basher → miner; builder → basher; digger → builder; miner → builder. Three-step plans: basher → miner → builder; builder → basher → miner. Also practise multiple-worker-coordination.
  
• 204. Dr Lemminggood — Oh No! More Lemmings. Worker roles: bomber; builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 205. The Voyage Home... — Holiday Lemmings 1993. Worker roles: bomber; bomber + digger. Job changes: digger → bomber.
  
• 206. Quest for Kieran — Holiday Lemmings 1994. Worker roles: builder; miner. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 207. CindyLand — Holiday Lemmings 1994. Worker roles: basher; blocker. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 208. Steel Ice Span — Holiday Lemmings 1994. Worker roles: builder; builder + climber. Job changes: climber → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 209. Up, up, and away! — Holiday Lemmings 1994. Worker roles: basher + builder; builder. Job changes: builder → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 210. How on Earth? — Oh No! More Lemmings. Worker roles: blocker; blocker + builder; builder. Job changes: builder → blocker. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 211. Got anything....Lemmingy??? — Oh No! More Lemmings. Worker roles: builder; digger. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 212. Presents of Mind — Holiday Lemmings 1993. Worker roles: basher + builder; builder. Job changes: basher → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 213. Evacuating a coal mine — Oh Yes! More Lemmings!. Worker roles: basher + builder + climber + miner; builder. Job changes: basher → miner; builder → basher; builder → miner; climber → basher; miner → builder. Three-step plans: basher → miner → builder; climber → basher → miner; miner → builder → basher.
  
• 214. This Corrosion — Oh No! More Lemmings. Worker roles: builder; builder + digger; digger. Job changes: digger → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 215. Marshmallow Land — Holiday Lemmings 1993. Combine measured timing pressure with concurrent work.
  
• 216. ROCKY VI — Oh No! More Lemmings. Worker roles: basher + builder; bomber + builder; builder. Job changes: basher → builder; builder → bomber. Also practise release-rate-manipulation.
  
• 217. Santus Lemmingus — Holiday Lemmings 1993. Worker roles: basher + digger; builder + climber + digger + floater. Job changes: climber → floater; digger → basher; digger → builder; floater → digger. Three-step plans: climber → floater → digger; floater → digger → builder.
  
• 218. On the Antarctic Coast — Oh No! More Lemmings. Worker roles: basher; builder; miner. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 219. Inroducing SUPERLEMMING — Oh No! More Lemmings. Worker roles: basher + builder + climber + digger + miner. Job changes: basher → climber; builder → basher; builder → digger; climber → digger; digger → builder; miner → basher. Three-step plans: basher → climber → digger; climber → digger → builder; digger → builder → basher; miner → basher → climber.
  
• 220. NO PROBLEM — Oh No! More Lemmings. Worker roles: basher + builder + miner. Job changes: basher → builder; basher → miner; builder → basher; builder → miner; miner → builder. Three-step plans: basher → builder → miner; builder → basher → miner; miner → builder → basher. Also practise release-rate-manipulation.
  
• 221. DIGGING FOR VICTORY — Oh No! More Lemmings. Control crowd spacing through a route that uses five skills.
  
• 222. Up on the Rooftops — Holiday Lemmings 1994. Worker roles: builder; builder + climber + floater. Job changes: climber → floater; floater → builder. Three-step plans: climber → floater → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 223. The Stack — Oh No! More Lemmings. Worker roles: builder; builder + climber + digger. Job changes: builder → digger; climber → builder; climber → digger; digger → builder. Three-step plans: climber → builder → digger; climber → digger → builder. Also practise multiple-worker-coordination.
  
• 224. The gate trap Lemmings. — Oh Yes! More Lemmings!. Worker roles: basher; basher + builder + digger; blocker; builder. Job changes: basher → builder; builder → basher; digger → basher. Three-step plans: digger → basher → builder. Also practise multiple-worker-coordination.
  
• 225. Sir Edmund Hilemming — Holiday Lemmings 1994. Worker roles: builder; builder + digger; builder + miner. Job changes: builder → miner; digger → builder; miner → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 226. Three-way Call — GARJEN01. Combine a high resource pressure with work across several regions.
  
• 227. Ten Green Lemmings — cLemmings Taxing. Bridge moderate coordination and expert concurrency with a busier familiar-skill route.
  
• 228. Doomsday — Oh Yes! More Lemmings!. Worker roles: blocker + bomber; blocker + bomber + builder; blocker + builder; builder; climber. Job changes: blocker → bomber; builder → blocker. Three-step plans: builder → blocker → bomber.
  
• 229. Born a blocker, die a blocker — PSP Special 27 36. Worker roles: blocker + climber; climber. Job changes: climber → blocker.
  
• 230. Tribute to M.C.Escher (remake) — LEMREMAKE. Worker roles: basher + builder + climber + floater + miner; builder + miner. Job changes: basher → builder; builder → miner; climber → floater; floater → builder; miner → basher. Three-step plans: builder → miner → basher; climber → floater → builder; floater → builder → miner; miner → basher → builder. Also practise release-rate-manipulation.
  
• 231. One way digging to freedom — Lemmings. Worker roles: basher + builder + climber + digger + floater. Job changes: basher → builder; basher → digger; basher → floater; builder → basher; climber → basher; digger → basher; digger → builder; floater → digger. Three-step plans: basher → floater → digger; climber → basher → digger; digger → basher → floater; digger → builder → basher; floater → digger → builder.
  
• 232. A ladder would be handy — Lemmings. Worker roles: basher + digger; builder + climber + floater + miner. Job changes: builder → climber; builder → miner; climber → builder; digger → basher; floater → builder. Three-step plans: climber → builder → miner; floater → builder → climber. Also practise multiple-worker-coordination.
  
• 233. Happy New Year! — Holiday Lemmings 1994. Worker roles: basher; basher + bomber + builder; basher + builder; blocker; blocker + builder. Job changes: basher → bomber; basher → builder; builder → basher; builder → blocker. Three-step plans: builder → basher → bomber. Also practise multiple-worker-coordination.
  
• 234. SPAM,SPAM,SPAM,EGG AND LEMMING — Oh No! More Lemmings. Worker roles: basher + builder + floater + miner; blocker; blocker + bomber. Job changes: basher → miner; blocker → bomber; builder → basher; floater → builder; miner → builder. Three-step plans: basher → miner → builder; builder → basher → miner; floater → builder → basher. Also practise release-rate-manipulation.
  
• 235. Lemming Productions Present... — Oh No! More Lemmings. Worker roles: basher + bomber + builder + climber; blocker; blocker + bomber + climber; miner. Job changes: blocker → bomber; bomber → builder; bomber → climber; builder → basher; climber → bomber. Three-step plans: blocker → bomber → climber; bomber → builder → basher; climber → bomber → builder. Also practise multiple-worker-coordination.
  
• 236. Wild Lemmings — Oh No More cLemmings Wild. Worker roles: blocker + bomber; builder + digger + floater + miner. Job changes: blocker → bomber; builder → miner; digger → floater; floater → builder; miner → builder. Three-step plans: digger → floater → builder; floater → builder → miner.
  
• 237. Have a nice day! — Lemmings. Worker roles: basher; blocker; builder; builder + digger + floater; builder + miner. Job changes: builder → digger; builder → miner; digger → builder; floater → builder. Three-step plans: floater → builder → digger. Also practise multiple-worker-coordination.
  
• 238. Faithful Friends — GARJEN09. Worker roles: basher + climber; basher + climber + digger + floater; climber; climber + miner. Job changes: basher → climber; climber → floater; climber → miner; digger → basher; digger → climber; floater → digger. Three-step plans: climber → floater → digger; digger → climber → floater; floater → digger → basher. Also practise multiple-worker-coordination.
  
• 239. Lemmings' Ark — Genesis Mayhem. Use five distinct skills in one worker's sequence.
  
• 240. A Beast of a level — Lemmings. Worker roles: basher; basher + blocker; basher + builder; builder + digger; builder + miner. Job changes: basher → builder; blocker → basher; builder → basher; digger → builder; miner → builder.
  
• 241. Time waits for no Lemming — Oh No! More Lemmings. Worker roles: basher + blocker; blocker; builder; digger. Job changes: basher → blocker. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 242. Lemming Rhythms — Oh No! More Lemmings. Worker roles: basher + builder + miner. Job changes: basher → builder; builder → basher; builder → miner; miner → builder. Three-step plans: basher → builder → miner; miner → builder → basher. Also practise release-rate-manipulation.
  
• 243. Seeing double! — PSP Special 11 26 of 36. Worker roles: basher + builder; basher + builder + climber; basher + climber; blocker + bomber; climber. Job changes: basher → builder; blocker → bomber; builder → basher; builder → climber; climber → basher. Three-step plans: basher → builder → climber. Also practise release-rate-manipulation.
  
• 244. Ecsape From Nightmare — ssam1221s Lemmings Havoc. Worker roles: basher; basher + builder; builder. Job changes: basher → builder; builder → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 245. Water processing plant — Oh Yes! More Lemmings!. Worker roles: basher + builder + miner; builder; builder + floater. Job changes: builder → miner; floater → builder; miner → basher. Three-step plans: builder → miner → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 246. Just a minute (Part Three) — Oh Yes! More Lemmings!. Worker roles: basher + climber + miner; basher + digger. Job changes: basher → miner; climber → miner; digger → basher; miner → basher. Three-step plans: climber → miner → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 247. It`s the price you have to pay — Oh No! More Lemmings. Worker roles: basher; basher + builder + digger + miner; basher + builder + miner. Job changes: basher → builder; builder → digger; digger → miner; miner → basher. Three-step plans: builder → digger → miner; digger → miner → basher; miner → basher → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 248. X marks the spot — Lemmings. Worker roles: builder; builder + climber + miner; miner. Job changes: builder → climber; builder → miner; climber → miner; miner → builder. Three-step plans: builder → climber → miner; climber → miner → builder. Also practise multiple-worker-coordination.
  
• 249. Emmings!  (No L) — Holiday Lemmings 1994. Worker roles: builder; builder + climber + digger; builder + climber + digger + miner; miner. Job changes: climber → digger; digger → builder; miner → climber. Three-step plans: climber → digger → builder; miner → climber → digger. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 250. Were ready for landing — Giga pack 04. Worker roles: basher + builder; builder; builder + climber + miner; digger; miner. Job changes: basher → builder; builder → basher; builder → miner; climber → builder; miner → builder. Three-step plans: climber → builder → miner. Also practise multiple-worker-coordination.
  
• 251. Why do you all look the same? — AkseliPack01. Worker roles: basher + builder + digger; blocker + builder. Job changes: basher → builder; blocker → builder; builder → basher; digger → builder. Three-step plans: digger → builder → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 252. Take care, Sweetie — Oh No! More Lemmings. Worker roles: builder + climber. Job changes: builder → climber.
  
• 253. Lemming City — Pieuws Lemmings 2007 Awkward. Worker roles: basher; basher + builder + climber + floater. Job changes: basher → builder; basher → floater; builder → basher; climber → basher; floater → basher. Three-step plans: climber → basher → floater; floater → basher → builder. Also practise multiple-worker-coordination.
  
• 254. Patience — Lemmings. Worker roles: blocker + climber; builder; builder + climber + digger + floater + miner. Job changes: blocker → climber; builder → climber; builder → digger; climber → floater; digger → miner; floater → builder; miner → builder. Three-step plans: builder → climber → floater; builder → digger → miner; climber → floater → builder; digger → miner → builder; floater → builder → digger. Also practise multiple-worker-coordination.
  
• 255. Go Thataway! — Holiday Lemmings 1994. Worker roles: basher + builder + climber + floater. Job changes: builder → basher; climber → floater; floater → builder. Three-step plans: climber → floater → builder; floater → builder → basher. Also practise release-rate-manipulation.
  
• 256. Science from the 4th dimension — Mikes Lemmix Pack. Worker roles: basher + blocker; basher + builder + climber; basher + digger; blocker; blocker + climber; digger; miner. Job changes: blocker → basher; builder → basher; climber → blocker; climber → builder; digger → basher. Three-step plans: climber → builder → basher. Also practise release-rate-manipulation.
  
• 257. Fall and no life (Part Two) — Oh Yes! More Lemmings!. Worker roles: basher; basher + builder + floater + miner; builder; miner. Job changes: basher → builder; basher → miner; builder → basher; floater → builder; miner → basher. Three-step plans: builder → basher → miner; floater → builder → basher; miner → basher → builder. Also practise multiple-worker-coordination.
  
• 258. Four Play — Holiday Lemmings 1994. Worker roles: basher + builder + digger; digger. Job changes: basher → builder; digger → basher. Three-step plans: digger → basher → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  

Expert (34 lessons)

• 259. Lemming Net — Lemmings Plus DOS Project Wimpy. Apply familiar skills with demanding assignment timing.
  
• 260. It`s all a matter of timing — Oh No! More Lemmings. Apply the learned techniques across highly concurrent work.
  
• 261. Who`s That Lemming — Oh No! More Lemmings. Worker roles: basher; blocker + bomber + floater; bomber + climber; builder; builder + floater; climber; floater; miner. Job changes: blocker → bomber; bomber → floater; builder → floater; climber → bomber. Three-step plans: blocker → bomber → floater.
  
• 262. SUNSOFT Special — Oh Yes! More Lemmings!. Worker roles: basher + builder + digger; blocker; blocker + bomber. Job changes: basher → builder; blocker → bomber; builder → basher; digger → basher. Three-step plans: digger → basher → builder. Also practise release-rate-manipulation.
  
• 263. KEEP ON TRUCKING — Oh No! More Lemmings. Combine a complex multi-skill route with high resource pressure.
  
• 264. Just A Quicky — Oh No! More Lemmings. Worker roles: basher + builder + digger + miner. Job changes: basher → builder; basher → digger; builder → basher; builder → miner; digger → builder; miner → builder; miner → digger. Three-step plans: basher → builder → miner; basher → digger → builder; builder → basher → digger; digger → builder → basher; miner → builder → basher; miner → digger → builder. Also practise release-rate-manipulation.
  
• 265. Tubular Lemmings — Oh No! More Lemmings. Worker roles: builder + digger. Job changes: builder → digger; digger → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 266. Save Me — Lemmings. Worker roles: basher + blocker + builder + digger; basher + builder + digger; blocker; blocker + builder. Job changes: basher → digger; blocker → basher; blocker → builder; builder → basher; builder → blocker; builder → digger; digger → builder. Three-step plans: basher → digger → builder; blocker → basher → digger; digger → builder → basher; digger → builder → blocker.
  
• 267. It`s a tight fit! — Oh No! More Lemmings. Worker roles: builder + climber + floater; climber + floater. Job changes: climber → floater; floater → builder. Three-step plans: climber → floater → builder. Also practise release-rate-manipulation.
  
• 268. There's a lot of them about — Lemmings. Worker roles: blocker + builder; builder; builder + climber; miner. Job changes: builder → blocker; builder → climber; climber → builder. Also practise multiple-worker-coordination.
  
• 269. Not just a pretty Lemming — Oh No! More Lemmings. Worker roles: basher; basher + miner; blocker + bomber + climber; bomber + floater; builder; climber; floater; miner. Job changes: blocker → bomber; bomber → climber; bomber → floater; miner → basher. Three-step plans: blocker → bomber → climber. Also practise multiple-worker-coordination.
  
• 270. Creature Discomforts — Oh No! More Lemmings. Worker roles: basher + builder + climber + miner; blocker; blocker + bomber; builder; builder + climber + digger; climber. Job changes: basher → miner; blocker → bomber; builder → climber; climber → builder; digger → builder; miner → climber. Three-step plans: basher → miner → climber; digger → builder → climber; miner → climber → builder. Also practise multiple-worker-coordination.
  
• 271. ONWARD AND UPWARD — Oh No! More Lemmings. Worker roles: basher + bomber + builder + climber + miner; blocker + bomber; blocker + bomber + climber; bomber. Job changes: basher → bomber; basher → builder; blocker → bomber; builder → basher; climber → blocker; climber → miner; miner → basher. Three-step plans: builder → basher → bomber; climber → blocker → bomber; climber → miner → basher; miner → basher → builder. Also practise release-rate-manipulation.
  
• 272. And now this... — Oh No! More Lemmings. Worker roles: basher; basher + climber; blocker + bomber + builder + digger + floater; builder; climber; floater. Job changes: basher → climber; blocker → bomber; bomber → floater; builder → blocker; climber → basher; digger → builder. Three-step plans: blocker → bomber → floater; builder → blocker → bomber; digger → builder → blocker.
  
• 273. I have a cunning plan — Lemmings. Worker roles: basher + blocker; basher + builder + digger; blocker + builder; builder + digger + miner. Job changes: basher → blocker; blocker → builder; builder → basher; builder → digger; builder → miner; digger → builder; digger → miner; miner → builder. Three-step plans: builder → digger → miner; digger → builder → basher; digger → miner → builder; miner → builder → digger.
  
• 274. Lemmings in a situation — Oh No! More Lemmings. Worker roles: basher + bomber + builder + climber + digger + floater. Job changes: basher → builder; builder → basher; builder → digger; climber → floater; digger → bomber; digger → builder; floater → builder. Three-step plans: basher → builder → digger; builder → digger → bomber; climber → floater → builder; digger → builder → basher; floater → builder → digger.
  
• 275. Snuggle up to a Lemming — Oh No! More Lemmings. Worker roles: basher + digger; blocker + bomber; blocker + bomber + climber + miner; bomber; climber; digger; floater. Job changes: blocker → bomber; bomber → climber; digger → basher; miner → blocker. Three-step plans: blocker → bomber → climber; miner → blocker → bomber. Also practise multiple-worker-coordination.
  
• 276. Origins and Lemmings — Lemmings. Carry permanent skills through a complex construction sequence.
  
• 277. Oogilemming! — Holiday Lemmings 1993. Worker roles: basher + builder + digger; blocker; builder + climber + floater. Job changes: basher → builder; builder → basher; climber → floater; digger → builder; floater → builder. Three-step plans: climber → floater → builder; digger → builder → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 278. Get the Point? — Holiday Lemmings 1994. Worker roles: blocker + floater; builder; builder + digger + floater; builder + floater; floater. Job changes: digger → builder; floater → blocker; floater → builder; floater → digger. Three-step plans: floater → digger → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 279. Merry Christmas Mr Lemming — Xmas Lemmings 1991. Worker roles: basher + builder + climber + digger + miner. Job changes: basher → builder; basher → climber; basher → miner; builder → basher; builder → miner; climber → digger; digger → builder; miner → basher; miner → builder. Three-step plans: basher → builder → miner; basher → climber → digger; basher → miner → builder; builder → basher → miner; builder → miner → basher; climber → digger → builder; digger → builder → miner; miner → basher → builder.
  
• 280. The Far Side — Lemmings. Worker roles: basher + builder + climber + digger + miner. Job changes: basher → builder; basher → digger; builder → basher; builder → climber; builder → digger; climber → digger; digger → basher; digger → builder; digger → miner; miner → builder; miner → digger. Three-step plans: basher → digger → builder; builder → basher → digger; builder → climber → digger; builder → digger → basher; builder → digger → miner; climber → digger → miner; digger → basher → builder; digger → miner → builder; miner → builder → digger.
  
• 281. Stepping Stones — Lemmings. Worker roles: basher + blocker + digger; basher + builder + climber + digger + miner; basher + miner; blocker; builder. Job changes: basher → digger; basher → miner; blocker → digger; builder → miner; climber → miner; digger → basher; digger → builder; miner → climber; miner → digger. Three-step plans: basher → digger → builder; blocker → digger → basher; climber → miner → digger; digger → builder → miner; miner → digger → basher.
  
• 282. Don't let your eyes deceive you — Lemmings. Worker roles: blocker + climber + floater; builder; builder + climber + digger + floater + miner; builder + climber + floater; climber + digger + floater + miner. Job changes: blocker → floater; builder → digger; climber → floater; digger → miner; floater → blocker; floater → builder; floater → climber; floater → digger; miner → climber. Three-step plans: blocker → floater → climber; builder → digger → miner; climber → floater → blocker; climber → floater → builder; digger → miner → climber; floater → builder → digger; floater → digger → miner. Also practise multiple-worker-coordination.
  
• 283. Rendezvous at the Mountain — Lemmings. Worker roles: builder; builder + climber + digger + miner; builder + climber + miner; builder + digger; climber + digger + miner. Job changes: builder → digger; builder → miner; climber → builder; climber → digger; climber → miner; digger → builder; digger → miner; miner → builder. Three-step plans: climber → builder → digger; climber → digger → miner; climber → miner → builder; digger → builder → miner. Also practise multiple-worker-coordination.
  
• 284. The Fast Food Kitchen... — Lemmings. Worker roles: basher; basher + blocker + builder + digger; basher + builder; basher + builder + digger; basher + miner; blocker; builder; builder + climber + digger; builder + climber + floater. Job changes: basher → builder; basher → digger; blocker → digger; builder → basher; climber → builder; climber → digger; digger → basher; digger → builder; floater → climber; miner → basher. Three-step plans: basher → digger → builder; blocker → digger → builder; climber → digger → builder; digger → builder → basher; floater → climber → builder. Also practise multiple-worker-coordination.
  
• 285. Chill out! — Oh No! More Lemmings. Combine long worker sequences, crowd spacing and concurrent work.
  
• 286. AAAAAARRRRRRGGGGGGHHHHHH!!!!!! — Oh No! More Lemmings. Worker roles: builder; climber; climber + miner. Job changes: climber → miner. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 287. Up and Over — cLemmings Tricky. Worker roles: basher + builder + climber + floater + miner; blocker + builder; builder; digger; miner. Job changes: basher → builder; builder → blocker; builder → floater; builder → miner; climber → builder; floater → builder; miner → basher. Three-step plans: basher → builder → floater; builder → miner → basher; climber → builder → miner; miner → basher → builder. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 288. It Came Upon a Lemnight Clear — Holiday Lemmings 1993. Worker roles: basher + bomber + builder + climber; blocker; builder; digger + miner. Job changes: basher → builder; builder → basher; builder → bomber; climber → builder; digger → miner. Three-step plans: basher → builder → bomber; climber → builder → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 289. Zygoptera — AkseliPack01. Worker roles: basher + digger; blocker; bomber; builder; climber; miner. Job changes: basher → digger. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 290. Waste High! — ANTHPCK5. Worker roles: blocker + bomber; builder + climber + floater + miner; builder + digger. Job changes: blocker → bomber; builder → climber; builder → miner; climber → builder; digger → builder; floater → builder; miner → builder. Three-step plans: climber → builder → miner; floater → builder → climber. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 291. A group of entrances — Genesis Mayhem. Worker roles: basher + builder; basher + climber; basher + digger; blocker + bomber; builder; miner. Job changes: basher → builder; basher → digger; blocker → bomber; builder → basher; climber → basher; digger → basher. Also practise multiple-worker-coordination, release-rate-manipulation.
  
• 292. Three Birds With One Stone — Lemmings Plus DOS Project PSYCHO. Worker roles: blocker + bomber + climber + floater; bomber + builder + climber + digger; bomber + climber + floater; builder; climber + floater + miner; floater. Job changes: blocker → bomber; builder → digger; climber → builder; climber → floater; digger → bomber; floater → blocker; floater → bomber; floater → miner. Three-step plans: builder → digger → bomber; climber → builder → digger; climber → floater → blocker; climber → floater → bomber; climber → floater → miner; floater → blocker → bomber. Also practise multiple-worker-coordination, release-rate-manipulation.
  

[Proxima]

I haven't looked in depth at the list (500 levels is a lot to look through, and I don't know all of the levels anyway) but my first thought is that the project's premise seems rather misguided. Putting together all the levels from every version of Lemmings, arranging them in difficulty order and then recommending new players to play them in order means that the difficulty level stays at "very, very easy" for much too long and players will most likely get bored. A quick glance at your list bears this out -- "Only floaters can survive this" as level 93, really? This is a tutorial level whose entire purpose is to be a first introduction to floaters. If floaters have appeared on any previous level, it should be cut. If you have several different floater tutorial levels, select just one. (And the same with each of the other skills.)

This is more or less what we did with Lemmings Redux. I'm not saying we got it perfectly right, but we looked over all the levels we were considering adding to the easy rank and made sure each one contributed something distinct that justified its place -- e.g. "Snuggle up to a lemming" introduces steel; "Downwardly mobile lemmings" requires you to think about where to dig down to avoid creating a splat distance.

(I'm not saying you should remove a bunch of levels from the engine; having one source from which all levels can be played is a worthy goal. But the main recommended way to play should be more selective.)

[UltimateLemmings]

This is excellent feedback. The curve needs to move off the "fun" plane and get into the intermediate strata earlier (which is what I feel is missing in the first place). This is a starting point, and it will definitely be refined as I playtest it manually along with player feedback. Obvious candidates for removal will be redundant skill introduction levels.

For the record, this is just one way to play the game. All the original levels are in the original order if you want them.

[UltimateLemmings]

I have now updated the golden path, reducing it to 292 levels with a much nicer curve, focusing on the intermediate section as well as clear teaching progression through skills and techniques. Thank you again for your feedback!