LemFan's various packs

Guigui · January 31, 2026, 12:45:18 AM

I'm currently playing the BadLems pack and encounter a weird behavior of NL : most of the time when I clear a level and move to the next, NL goes in Replay Mode and I get the replay for the previous level I just cleared.

I never encountered this behavior in any other pack I played. Is there a logical explanation to this ?

Proxima · January 31, 2026, 01:02:00 AM

That can happen if different levels have the same ID. Ideally, the packs should be updated to fix this, but that's a lot of work.

Guigui · January 31, 2026, 01:39:59 AM

Thank you for the explanation. This is indeed the case : some consecutive levels have the same ID, so NL thinks they are the same level and trigger the auto replay.

Since the pack is only 40 levels long, I'd say it would not be very long to open them all and click the "random ID" button. Not sure if it would be beneficial to anyone though.

Anyone noticed if this happens in other longer packs from LemFan ?

JawaJuice · January 31, 2026, 11:12:11 AM

Hey @Guigui!

I also noticed this when playing through BadLems. I didn't know what the reason for it was until now, reading Proxima's explanation, but didn't really bother about it - just figured it was some kind of glitch with the pack! I haven't encountered the same problem with any other LemFan pack that I can recall. There was a different issue with a couple of the really early packs (Pack 2 and Pack 3 I think), where every level file was put into a separate sub-folder, rather than having multiple nxlv files in a single rank folder with a levels.nxmi file to organize them.

jkapp76 · January 31, 2026, 04:13:11 PM

Try This version. It might have the levels fixed. I believe I have all of his packs updated correctly somwehere.

LemFan · January 31, 2026, 09:28:17 PM

Thanks for fixing the pack jkapp76! Sorry I didn't pay attention to the IDs when making the levels back in 2021. At least someone FINALLY did the job!

Guigui · January 31, 2026, 10:59:32 PM

Here are my solutions for BadLems.

Overall I'd say it is a nice pack with moderate difficulty, and a lot of open ended levels. Clearing it did not take me too long, and I recognized many tricks you can learn while playing the NL Introduction Pack by Icho.

If I had to guess I'd say that you played the NL Introduction Pack prior to making this one LemFan ?

Flopsy · February 02, 2026, 04:44:55 PM

I'm sure I'll be playing one of LemFan's packs soon.

All of the packs are in the pool for my NeoLemmix 30 series on my YouTube channel.

I have not encountered one yet and I pick a pack at random every time.

LemFan · February 02, 2026, 06:18:18 PM

Great to hear Flopsy! I've been watching your playthrough videos since 2018

kaywhyn · February 06, 2026, 07:14:35 PM

Thanks @jkapp for updating the BadLems pack so the levels have different IDs. I've updated the zip file with all the level packs in the OP

Quote from: Guigui on January 31, 2026, 12:45:18 AMI'm currently playing the BadLems pack and encounter a weird behavior of NL : most of the time when I clear a level and move to the next, NL goes in Replay Mode and I get the replay for the previous level I just cleared.

I never encountered this behavior in any other pack I played. Is there a logical explanation to this ?

@Guigui

Yea, as Proxima mentioned it's due to the levels having the same ID, which therefore confuses and throws off the game because it finds a match and therefore runs the same replay as the previous level. Apparently this was reported by Icho from way back in 2021 and hence you aren't the first to notice it

Quote from: IchoTolot on April 25, 2021, 01:39:57 PMIf you create a new level always click on new level in the editor and be sure you get a new ID!

If all levels have more or less the same idea the replay system can get really messy.

So, BadLems apparently wasn't updated to fix this, which depending on the pack size can be quite tedious to do.

As for the other packs, for Lemmingshades and Lemmings Rundown I didn't encounter the replay issue. The rest of the packs I'm not sure, as I haven't played any of the others, though it seems like the ones before the two I mentioned are fine as well in regards to the replay problem.

JawaJuice · April 23, 2026, 10:34:59 PM

I decided to return to a pack I hadn't completed yet, Lemmings Rundown. I managed to finish the pack with the exception of a single level, annoyingly; Mayhem 14 'Problems Go Wrong'. This was a very enjoyable pack overall, with puzzles that are much better designed than LemFan's earliest packs - it represents a decent challenge. Difficulty is still a bit all over the place, e.g. the first level of Mayhem, 'The Middle of Marble' is almost the hardest level of the whole rank! It's one of the few levels that completely stumped me initially and which I had to circle back to (more than once!). Level 13 of Tricky, 'Apartment Block' was one of the hardest of the entire pack imo, way too difficult for its rank; should have been in Mayhem. Despite some unwelcome spikes in the difficulty curve and some real tough nuts (mostly in Mayhem, though some in Taxing), I'd be inclined to agree with kaywhyn that it is easier than Lemmingshades; Oddlems too, from what I've played of that.

@Kaywhyn I know you said Lemmings Rundown was 100% solvable; would you be kind enough to share your replay for 'Problems Go Wrong'? I'd really like to see how it's done! It seems impossible to me, with the skills given.

Spoiler

I can almost do it, by making the second lemming from the right-hand crowd build to the left, then making the second lemming of the left-hand crowd a climber while the first one bombs away the OWU floor, but because the builder goes through the thin wall, that turns the climber around.

If anyone else fancies a crack at this particular level, have at it!

Replays attached, excluding Mayhem 14.

kaywhyn · April 23, 2026, 10:49:29 PM

Quote from: JawaJuice on April 23, 2026, 10:34:59 PM@Kaywhyn I know you said Lemmings Rundown was 100% solvable; would you be kind enough to share your replay for 'Problems Go Wrong'? I'd really like to see how it's done! It seems impossible to me, with the skills given.

Sure thing! My Mayhem 14 replay attached

Regarding your spoiler, you almost have it indeed!

Spoiler

The first Lemming from the the left entrance should be the climber AND the one you bomb instead, when he has fallen back down, therefore allowing the second Lemming from that entrance through instead of falling to the bottom like the others

Everything else, including the ones you felt are too hard for their position, I agree! Tricky 13 massively agree there, and yup, Mayhem 1 also managed to stump me for a while too.

You just reminded me that I need to post my feedback/replays for Lemmingshades and Lemmings Rundown. I'll do that when I get the chance at some point

JawaJuice · April 23, 2026, 11:17:19 PM

Nice one, kaywhyn!

Spoiler

Indeed, I basically had the solution, except for making the first of the left-hand lemmings a climber rather than the second, then having him explode on falling as he fails to climb! A particularly fiddly little execution, but not atypical for LemFan so probably should have expected something like that

You will no doubt post detailed feedback, which I look forward to reading as always

I'll just say that despite criticisms of occasional weird difficulty spikes in Mayhem, LemFan does pretty much save some of the hardest levels for last, which is what you want. 18 'A Connecting Game', 19 'Lemming Brushpast' and 20 'Pack Finalised' are no joke! The latter derives its difficulty from running out of skills - it's so easy to wind up a skill or two short of being able to complete it; similar to the final level of Nota_Steve's pack in that way, I thought. Lemmings Rundown is actually comparable in difficulty to NotaLems, though it is harder at its peak toughness imo.

You've reminded me I need to go back to Lemmingshades. I gave up on it before, but I'm on LemFan's wavelength now!