If the .dat files are the same file format as for original Lemmings/CustLemm (and not just coincidentally the same file extension), then they are bundled and compressed .lev files. You could probably check if you can load these files and play the levels in CustLemm/Lemmix/GoLems, and if yes, we should be able to dig out some tool to split them into .lev which you can then convert further.

Quote from: Ron_Stard on August 15, 2026, 03:31:59 PMI don't know many of the topics mentioned in the iceberg (and I would like to know them all!), but I'm surprised that there is no mention of Martin Zurlinden and his Mazulems, the DHTML versions of Lemmings, the meaning of the 22934 level from L2 The Tribes, or the curious and happy story of Kieran Miller.

'Love a lemming' , ' Flink's wrong spell' and Lemmings 2 storybook too . Anyway, i don't know about Kieren miller one which is showed something unrelated crime news as i just searched it

Might be better to just move the pack to the SuperLemmix board, since having radiation means it was intended to be played in SLX. Or are the pieces merely decorative?

thankyou for this eric! i put your attached styles in the neolemmix styles folder, and the fixed level 86 in the level pack's level folder and everything works now as expected. maybe these fixes should be added to the original post at the top so other people don't run into the same problems?

Most likely related to this bug.

The Miner is moved down 2px at frame 0. I haven't been able to figure out why this is, but I imagine it's so that the sprite lines up correctly with the movement.

It probably does warrant further investigation if this is what we're seeing again and again (i.e. Miners clipping through terrain). In the case reported by Flopsy, the movement takes the Miner's foot position into the water trigger and they transition to Drowner.

The terrain clip, then, is actually built into Miner physics. I need to find out:

1) How far back into Lemmini development history this bug goes.

2) What's the exact reason for this 2px adjustment?

For now, the bug is fixed for cases where the presence of Steel or One-Way-Arrows should turn the Miner. The bug discovered by Flopsy is extremely rare, but should still be guarded against if possible.

It appears level 86 has radiation pieces added (only opens in Superlemmix), so I just deleted those.

also here is dexter's chalkboard tile set (which should work for the levels using this tile set).

Also a few levels appear to use minim's cake tile set.

attached is level 86 (removed the radiation pieces), dexter's chalkboard tile set and minim's cake tile set.

I don't know many of the topics mentioned in the iceberg (and I would like to know them all!), but I'm surprised that there is no mention of Martin Zurlinden and his Mazulems, the DHTML versions of Lemmings, the meaning of the 22934 level from L2 The Tribes, or the curious and happy story of Kieran Millar.

RetroLemmini 3.2.1

Skip to 44:10 and watch the left side near the Blockers.

I was hoping the miner would have freed the blocker but it got turned but it then just bugs through the builder bridge leaving no hole. I freed the Blockers to test this and the rest of the Lemmings passed over where the miner drowned.

i've checked all 99 levels and level 1, 18, 86, 93, 95 and 96 have missing pieces. the other two error messages i get when starting up the pack are 'gadget dex_chalk:start is in pre- 12.7 format' and 'tbaseanimationset: athlete and/or selected lemming recoloring data missing'

thanks for the fast response Armani! i have installed the sanctuary tileset but this does not seem to fix the problems with missing pieces(the levels that use this tileset are loading okay for me after installing the style but i didn't attempt to load any of these levels beforehand.) i still get multiple error messages - but upon further inspection, only attempting to load the first level does not work? i tried the following levels up to level 10 and they all loaded fine, but have not gone through the whole pack on a level by level basis. this is the only level pack out of the 170 or so i have installed that throws up so many problems!