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#11
NeoLemmix Levels / Re: [NL 12.7.0+] Lemmings Dest...
Last post by Nessy - May 30, 2026, 02:36:25 AMNice to meet you too JawaJuice! Thanks for the kind words 
It honestly fills me with a lot of joy to see a lot of new faces, and even some older ones, still enjoying the world of Lemmings even after 35 years!
It honestly fills me with a lot of joy to see a lot of new faces, and even some older ones, still enjoying the world of Lemmings even after 35 years!
#12
NeoLemmix Levels / Re: [NeoLemmix] Lemmings Migra...
Last post by Nessy - May 30, 2026, 02:29:50 AMHey everyone!
I made a post under Destination a couple of days ago and wanted to make one here real quick. Thank you everyone once again for playing through my first pack and thank you for all the replays and comments
I'll hopefully be checking them out soon.
It's pretty surreal to think that I made this level pack almost a decade ago. I remember being so nervous to share it.
There's probably a lot of backroutes, but honestly, these days I love seeing what crazy solutions other people are able to come up with on a level with the available skillset, instead of trying to force "one way" of doing it. I guess there are some exceptions, especially if a level is too overly broken, but it happens haha.
I made a post under Destination a couple of days ago and wanted to make one here real quick. Thank you everyone once again for playing through my first pack and thank you for all the replays and comments
I'll hopefully be checking them out soon.It's pretty surreal to think that I made this level pack almost a decade ago. I remember being so nervous to share it.
There's probably a lot of backroutes, but honestly, these days I love seeing what crazy solutions other people are able to come up with on a level with the available skillset, instead of trying to force "one way" of doing it. I guess there are some exceptions, especially if a level is too overly broken, but it happens haha.
#13
Contests / Re: Level of the Year 2025: Pl...
Last post by 92Dexter11 - May 29, 2026, 06:59:52 PMQuoteI've played a lot of these levels before but it was fun to play through them again and refresh my memory. The main stuff I hadn't played was the majority of 92Dexter11's Lock & Key levels and a few from LDC 32. Overall, lots of ingenious design and you can definitely see why everything has been nominated for LOTY 2025 - worthy contenders all!
By and large, there's nothing particularly easy here! On the contrary, it makes for a challenging pack! I will say that aside from Armani's and Guigui's input, which I already knew, the levels from Lock & Key are comfortably the hardest ('No Looking Back' especially), occasionally utilizing quite obscure tricks but more often than not, just non-obvious solutions that take a very long time and lots of trial and error to figure out! 'kaywhyn's Organic National Park' gave them a good run for their money though; had me stumped for ages, that one!
Thank you for your kind words. I would also like to echo your statement about the lots of ingenious designs for all of the other contest finalists - there are some really amazing levels here, good luck everyone!
QuoteI'll attach all of my replays and maybe the respective authors can let me know if I've discovered any unacceptable backroutes!
For my levels, the 'Lemmings Faithful' have no intended solution, although I would have to commend you for saving all the neutrals in 'Diamond in the Rough' - that replay blew me away when I saw it!
As for the 'Lock and Key' levels, all the solutions are intended, except for 'The Split' and 'Epilogue'.
The Split
For 'The Split', the backroute is pretty major in context, although for the purposes of the contest, I suppose it's fine. (The gimmick behind 'Lock and Key' is that it's intended to be a narrative with continuity, e.g., if the lemming is assigned a glider in one level, he'll start as a glider in the next level, but this context isn't relevant for the contest so it's fine here.) I'll have to release an update for it at some point later.
Epilogue
For Epilogue, the solution is very impressive and uses all available skills. Backroutes aren't really as relevant for this one, since in context it's the final level of the pack. Either way, it's fine for the purposes of the LOTY contest too!
#14
Lemmini / Re: [DISC] Removing support fo...
Last post by namida - May 28, 2026, 10:50:30 PMRather than just disregarding it for existing levels, could they be padded / shrunk accordingly?
#15
Lemmini / [DISC] Removing support for va...
Last post by WillLem - May 28, 2026, 10:18:50 PMThe next version of RetroLemmini (most likely 3.1) will no longer support variable level boundaries.
It's currently possible to set the boundaries to anything, but the default values are the only ones that actually make sense, at least from an engine maintenance point of view. Allowing them to be set to anything (particularly the top boundary, the physics for which is notoriously difficult to perfect) just causes unnecessary problems.
Furthermore, whilst variable boundaries might be a fun thing to experiment with, it's unlikely to produce any particularly good levels.
So, let's go ahead and set these values to defaults program-wide. Then, I can address the top-of-level physics properly and make sure there isn't anything unintended happening.
This topic is to provide users, creators and maintainers with an opportunity to voice any concerns or add to the discussion at this stage, before the next version is released.
Your silence = this will go ahead as planned, any levels affected by this change will be disregarded.
It's currently possible to set the boundaries to anything, but the default values are the only ones that actually make sense, at least from an engine maintenance point of view. Allowing them to be set to anything (particularly the top boundary, the physics for which is notoriously difficult to perfect) just causes unnecessary problems.
Furthermore, whilst variable boundaries might be a fun thing to experiment with, it's unlikely to produce any particularly good levels.
So, let's go ahead and set these values to defaults program-wide. Then, I can address the top-of-level physics properly and make sure there isn't anything unintended happening.
This topic is to provide users, creators and maintainers with an opportunity to voice any concerns or add to the discussion at this stage, before the next version is released.
Your silence = this will go ahead as planned, any levels affected by this change will be disregarded.
#16
Lemmini / Re: [BUG][+] Lemmings get trap...
Last post by WillLem - May 28, 2026, 09:59:30 PMThis bug has brought about the question of whether levels should be able to mess with the level boundaries. Personally, I see no good reason to allow this. It's most likely a hangover from support for some early level format or something, i.e. it seems unlikely to be a desired and intentional physics feature.
I'm tempted to strip variable level boundaries out of the code (the Editor doesn't support it directly anyway), and maintain the default boundaries for all levels. This will make it much easier to then tighten up top-of-level physics.
As it stands for now, I've gone ahead and committed the Builder fix (i.e. Builders now always stop building at Y=8, making it practically impossible for a lemming to reach Y<8), but will soon come back to the top-of-level stuff later, likely in a separate topic.
This one can be considered resolved, then.
Fixed in RLPlayer commit f142f69.
I'm tempted to strip variable level boundaries out of the code (the Editor doesn't support it directly anyway), and maintain the default boundaries for all levels. This will make it much easier to then tighten up top-of-level physics.
As it stands for now, I've gone ahead and committed the Builder fix (i.e. Builders now always stop building at Y=8, making it practically impossible for a lemming to reach Y<8), but will soon come back to the top-of-level stuff later, likely in a separate topic.
This one can be considered resolved, then.
Fixed in RLPlayer commit f142f69.
#17
Lemmini / Re: [BUG][?] Lemmings get trap...
Last post by WillLem - May 28, 2026, 05:27:00 PMConfirmed.
This is happening because of a clash between these physics rules:
1a) The level must specify a top boundary of 0 or greater, with 8 being the default if none is specified
1b) In the level provided by hrb264 (attached here), the boundary is set to 0, so lems can build all the way to the top of the level
2) If a builder lemming is at or above the top boundary (usually 8, but 0 in this case), they will stop building
3) If a lemming encounters an obstacle that is too tall for them to step onto or their y-position is less than or equal to 8, they turn around - the latter of these conditions is symptomatic, which is the source of this bug
The first and foremost fix is to stop lemmings from building when they reach the default top position. This is easy, and fixes hrb264's example level/replay.
Preventing lemmings from repeatedly turning (which is what traps them at the top of the level if they reach a certain height) is harder: what should the condition be, and how can we make sure the fix doesn't create side effect bugs of its own?
It's too hot to think about this right now. I'll come back to it later.
P.S. I've also attached a level (Top of Level Test) which makes it possible to reproduce the bug:
1) Allow 1 lemming to walk up the stairs (contain the others with Blockers). They will turn around before reaching the thin platform and begin to walk back down the stairs
2) From the stairs, have them build up to the platform. The platform will stop them, they will turn around, step into the thin platform, and continuously turn around
If we can prevent this, the bug will be fixed for all levels, regardless of any other factors.
This is happening because of a clash between these physics rules:
1a) The level must specify a top boundary of 0 or greater, with 8 being the default if none is specified
1b) In the level provided by hrb264 (attached here), the boundary is set to 0, so lems can build all the way to the top of the level
2) If a builder lemming is at or above the top boundary (usually 8, but 0 in this case), they will stop building
3) If a lemming encounters an obstacle that is too tall for them to step onto or their y-position is less than or equal to 8, they turn around - the latter of these conditions is symptomatic, which is the source of this bug
The first and foremost fix is to stop lemmings from building when they reach the default top position. This is easy, and fixes hrb264's example level/replay.
Preventing lemmings from repeatedly turning (which is what traps them at the top of the level if they reach a certain height) is harder: what should the condition be, and how can we make sure the fix doesn't create side effect bugs of its own?
It's too hot to think about this right now. I'll come back to it later.
P.S. I've also attached a level (Top of Level Test) which makes it possible to reproduce the bug:
1) Allow 1 lemming to walk up the stairs (contain the others with Blockers). They will turn around before reaching the thin platform and begin to walk back down the stairs
2) From the stairs, have them build up to the platform. The platform will stop them, they will turn around, step into the thin platform, and continuously turn around
If we can prevent this, the bug will be fixed for all levels, regardless of any other factors.
#18
NeoLemmix Levels / Re: TomatoLems [Difficulty: Ea...
Last post by Swerdis - May 28, 2026, 12:50:19 PMDespite being certainly a step up in terms of difficulty, the Tense-rank was not a hard as I thought - with one notable exception. My favourite levels ware Tense 1, Tense 8 and Tense 9.
Spoiler
Panic
1 - Help is on the way!
Repeat of Tense 7 and much easier than that. I think both levels should be swapped. This here is what came immediately in my mind when I first saw this level.
2 - Lemming-lime soda
I thought about the bottom route pretty early, but didn't think I could make it past the bucket without using a terrain-removing skill. So I was a bit surprised that the Lemming easily walked over the handle. Which solved the level.
3 - Tension
Another repat and a very good level. It's a bit of a playground with multiple solutions possible I assume. I had lots of skills left here.
4 - Freezer Burn
From hot to cold. The steam blower kills all the Lemmings from the upper entrance instantly, so one from the other hatch has to save them by building a bridge. This is not so easy as it requires some devious tricks such as interrupting a basher midstroke to gain height. Interesting however, that the pioneer is able to walk just beneath the steam blower without getting hit.
5 - The Serpent
This one is all about squeezing the crowd together as much as possible. I assigned three climbers to bring one through the trap. The rest is pretty standard.
6 - Lemming Replacement Therapy
Hard and pretty annoying level. Key was when I found out that three Miners at the bottom were enough (not four what I had thought before). This allowed me to make one more Lemming a miner at the start and delayed this particular Lemming - which was crucial.
7 - Be the girl you wann be
Easy one. Starting inside a bomber's hole, a basher can bash all the way right to the exit. In the end, some mid-stroke interruptions will do.
8 - Cave-divers
Builderless level. The only possible path is not hard to see. It's still not an easy level and this is because of the rock-crusher-trap. When the crowd arrives there, one Lemmings should have a small lead to make a digger hole and then bash. Increasing the Release rate to the max might help here.
All my solutions can be found here: https://www.youtube.com/@Swerdis
1 - Help is on the way!
Repeat of Tense 7 and much easier than that. I think both levels should be swapped. This here is what came immediately in my mind when I first saw this level.
2 - Lemming-lime soda
I thought about the bottom route pretty early, but didn't think I could make it past the bucket without using a terrain-removing skill. So I was a bit surprised that the Lemming easily walked over the handle. Which solved the level.
3 - Tension
Another repat and a very good level. It's a bit of a playground with multiple solutions possible I assume. I had lots of skills left here.
4 - Freezer Burn
From hot to cold. The steam blower kills all the Lemmings from the upper entrance instantly, so one from the other hatch has to save them by building a bridge. This is not so easy as it requires some devious tricks such as interrupting a basher midstroke to gain height. Interesting however, that the pioneer is able to walk just beneath the steam blower without getting hit.
5 - The Serpent
This one is all about squeezing the crowd together as much as possible. I assigned three climbers to bring one through the trap. The rest is pretty standard.
6 - Lemming Replacement Therapy
Hard and pretty annoying level. Key was when I found out that three Miners at the bottom were enough (not four what I had thought before). This allowed me to make one more Lemming a miner at the start and delayed this particular Lemming - which was crucial.
7 - Be the girl you wann be
Easy one. Starting inside a bomber's hole, a basher can bash all the way right to the exit. In the end, some mid-stroke interruptions will do.
8 - Cave-divers
Builderless level. The only possible path is not hard to see. It's still not an easy level and this is because of the rock-crusher-trap. When the crowd arrives there, one Lemmings should have a small lead to make a digger hole and then bash. Increasing the Release rate to the max might help here.
All my solutions can be found here: https://www.youtube.com/@Swerdis
#19
Other Projects / Re: Lemmoria
Last post by The64Watcher - May 28, 2026, 12:16:44 PMlemming movement test
#20
NeoLemmix Levels / Re: [NL 12.7.0+] Lemmings Dest...
Last post by JawaJuice - May 28, 2026, 09:24:06 AMHi Nessy! Great to see you back, and nice to meet to meet you! Gotta say, I really enjoyed playing through Destination, and Migration, both excellent packs!
Gotta say, I really enjoyed playing through Destination, and Migration, both excellent packs!