Thank you so much, really, now I can actually have these levels in NeoLemmix.

If you want to play the levels from the original games in NeoLemmix, this conversion is the most up-to-date and recommended.

Hi, it's been quite a while since I last visited this forum; I'm glad to see the Lemmings community is still creating fun content.

I have these levels for older versions of NeoLemmix, but I haven't been able to find versions compatible with the latest release; these are the official levels that used to be available for download from the NeoLemmix website.

I know Redux is highly recommended, but I also want to keep these levels because they are the ones I've played since I was a kid.

I tried converting them using NXPConvert, but I keep getting this error:

"Access violation at address 004FEAE7 in module 'NXPConvert.exe'. Read of address 0000000C"

I managed to convert the internal styles whenever possible (using nxpextract to extract all the .dat files), but in the "7 - Extra Levels.nxp" pack, for instance, there are some styles that GSConvert refuses to convert due to an "Unexpected end of file" error.

Anyway, I'm stuck now. I don't know if there are any other options left to try, so I'm asking for help—hoping someone can shed some light on this, or perhaps let me know if these packs have already been converted and I just haven't found them.

Old nxp levels.zip

Yeah, it looks right. And the format I remember is ".lev", not ".dat", so yeah - I'm probably thinking of the wrong engine here.

That being said - if WinLems offers any way to convert to the standard DOS format, you could go WinLems -> DOS -> NeoLemmix.

I think I followed the instructions to the letter, and it did create a **Cleanse** folder with several `.nxlv` files inside, but they're all empty levels. If I open one with NLEditor, it just shows a 1x1 px level

This is what I have. I don't know if I'm doing something wrong, but yes, these are WinLems levels by Warren Gaylen

Sorry for taking so much of your time. I really appreciate what you guys are doing to keep the game alive 

Quote from: Vexar on August 05, 2026, 03:19:13 PMThanks a lot! I started rebuilding some in NeoLemmix but is taking a lot of time, and I'd love to convert the rest to save time, is there a thread where I can download the old versions you're referring to?? It would help a lot

12.9.X release topic: https://www.lemmingsforums.net/index.php?topic=4872.0

To convert:
1. Create a subfolder of "levels" (call it whatever you like)
2. Put your levels in this folder
3. Create a "levels.nxmi" file in this folder. Look at an existing pack (it will have levels.nxmi inside each rank's folder) to see how to structure this file. Make an entry in it for each level you want to convert. (Note: When converting LVL files from DOS / etc, or older-version NeoLemmix level files, you do not need to create a levels.nxmi file as NeoLemmix will autodetect them. It won't automatically pick up other engines.)
4. Run the cleanse levels feature on it. (Open the level select, select your pack (not a level within it, the pack itself), hit Ok. It'll take you back to the title screen. Now press the F8 key.)
5. NL will create converted copies of your levels in a new folder, which IIRC will be called "cleanse".

Now - one thing I'm gonna have to correct myself on, I think I'm confusing WinLemm (unless you mean Windows 95 Lemmings, in which case that's the same format as DOS Lemmings and is fully supported for this process) with Lemmins, another clone. So I could be wrong about it being supported.

Thanks a lot! I started rebuilding some in NeoLemmix but is taking a lot of time, and I'd love to convert the rest to save time, is there a thread where I can download the old versions you're referring to?? It would help a lot

CE 1.1.2

During play, in the panel at the bottom of the screen, above the skills:

Number of lemmings turns red when it's not sufficient for winning. Okay.

Clock turns red at arbitrary time (1 minute? 15 seconds?) and turns purple when it's not sufficient for winning. Instead, ditch the arbitrary threshold. On different maps, different thresholds will feel like too short anyway. Consistently use red for insufficiency.

Save requirement is printed in blue? Blue makes it hard to read; the digits 5, 6, 8 look similar. And the blue makes the panel look more colorful than necessary. This removes the meaning of other colors. Practically every number is now a funky color at whim.

Clock is yellow when it is a time limit. Okay, we must pay attention. And it matches the yellow hourglass. (As said, don't put a blue save requirement; it makes the yellow blend in, the yellow becomes yet another irrelevant color next to the blue.)

Lemming count is yellow when there are neutral lemmings. Why is this important? Why do we have to pay attention? I would understand it becoming yellow when there are only neutral lemmings left.

Lemming count also becomes cyan in some cases? When and why?

-- Simon

CE 1.1.2
NL 12.14

After playing one level, NL displays the postview screen. It tells you:

Lemmings saved in your recent attempt
Lemmings saved in your record
Time taken in your recent attempt
Time taken in your record
Skills used in your record

It should also tell you the number of skills assigned in your recent attempt.

-- Simon

OK, we have this working quite well. Up to 20 levels can be saved in the list.

I've followed the usual blueprint: the first 9 items are '&indexed' so that they can be opened using 1-9 keys, and I've added a 'Clear' menu item as well so that the list can easily be cleared.

We can give this a test run in the next release.

Implemented in NLEditor commit 8907017.