I've streamed this pack on Twitch (along with two ArtLems levels). It'll be up for 14 days:

https://www.twitch.tv/videos/242379534

I've played the first two ranks and some of the third rank, and I've found a lot of backroutes, specifically in the following levels:
A Bridge Too Far (Fun 6), Grasping At Straws (Fun 7), The Ultimate Quest (Fun 10)
The Tree of Death (Also Fun 2), Most Valuable Lemming (Also Fun 5), The Burrowers (Also Fun 6)

I've also attached my replays. Overall, I had a LOT of fun streaming this pack, and I look forward to streaming it again at some point. Thanks for the pack, Kieran!

I've started a project for the New NeoLemmix since around October/November, and that is to help convert a lot of graphic sets stuck in the old format into the New Format.

Here is a list of tilesets that have not been converted yet. I will be taking care of converting all of these tilesets except where noted. Those that are highlighted in blue mean that these have been converted and submitted to Nepster for the next NeoLemmix update, but have not been released by him in a NeoLemmix update yet.

bulletride
Thorn - this is part of Contest #14. I will leave this to bulletride.

Colorful Arty
Arty's blue flames and rain/snow objects - the blue flames will be part of orig_fire, while snow will be in the special folder. The rain object is already part of namida_sky.
The additional terrain pieces in Arty's underwater set.

Flopsy
Death Egg - this is part of Contest #14. Flopsy will be taking care of this.

Flopsy and GigaLem
Labyrinth Zone

GigaLem
Holiday versions of the ONML graphic sets:
Xmas Rock
Xmas Brick
Xmas Bubble

Lemmings Plus Remastered sets
Tree Remaster
Metal Remaster
Purple Remaster

Gronkling
Electric
Ancient
Digital

Johannes
Droidlings tilesets:
Droidlings Brick
Droidlings Rock
Droidlings Circuit

Juanjo
Machine
Fantasy
Galaxy

loftyD and GigaLem
Launch Base Zone

nin10doadict
nin10doadict's cat trap and BitPolar tiles for a Casualemmings level - I will leave this to nin10doadict.
Tetris Attack Lava - nin10doadict says he will do this himself.

Plom510
Psychedelic Remaster

Plom's Sonic Sets
Studiopolis
Press Garden - Flopsy will handle this.
Metropolis - Flopsy will handle this.

Version 3 is now out!

mobius decided that since the Minesweeper graphic set is currently unavailable that we remake the levels using that set into ones that are available with NeoLemmix.

Changes:
-Replaced level "Brick Replacement Therapy" with lix level: Over and Under and Out
-changed level order:
a. Coming down alive and Sand Me Down Swapped.
b. Over and Under and Out moved to Arcane 14; A step two far moved to Arcane 5; Interval Training moved to Arcane 4.
-Lem Squared, Square Squabble, Pick Me Up and Training Zone Alpha have been redone and should work correctly without any extra tilesets.
-Changed the music in "Catch Your Death" and "Lem Squared".

Clammings also uses a custom graphic set that has not yet been released with the latest experimental version of NeoLemmix: Proxima's Minesweeper set. You can download it in the attachment below; extract this ZIP in to the same folder as the styles folder.
Minesweeper attachment removed as Proxima needs to make a fix to his Minesweeper set.

Also, a minor typo I found: Insane 4 "Altitude Training" should be titled "Advanced Altitude Training".

Thanks again for letting me work with you on this pack, mobius! It was a lot of fun helping you out!

I noticed a mistake with the Food tileset that came with the new NeoLemmix format: the horizontal bread piece "bread_01.png" is missing. I've uploaded an update to this set that has the missing piece, and I had to fix the translation table accordingly as well, as TERRAIN INDEX 1 and INDEX 2 both have "bread_02" listed down as the terrain piece.

For those who want to use the Minimal tileset for the New NeoLemmix format, I have converted it accordingly. The only change I made is that I fused the exit and the exit top together. I have also included a translation table.

Also, due to the trap using a custom sound, and that the Graphic Set Converter does not extract sounds (only the terrain/objects), the sound file is not included in the ZIP. To GigaLem: please post the trap's sound file in this topic as well.

I'm sorry to hear that as well, GigaLem That indeed sounds super-difficult. I understand that feeling of stress of adjusting to unexpected things that you don't want, and the difficulty associated with that. Thanks for sharing these concerns with us. I agree with Nessy, talking about these things instead of bottling them up is a great first step to dealing with your situation. I hope things gets better, GigaLem.

Awesome! Thanks, minglw!! I just uploaded that to Mindless's Level Database!

I'll take care of converting that this weekend!

Made a rule change to #2: Anyone can make videos of the Other Gimmicks levels (except levels 15 and 16). The X-Lems levels, I wouldn't do videos on (but you're more than welcome to make modifications to those levels and the Other Gimmicks).

Also, namida's Recycle Bin has all rejected gimmick levels.

I'm still going to be around on the forums, but I wasn't sure where else to announce this: after I stream GigaLem's Millas demo at an unspecified date (GigaLem will let me know a good time that he can watch me stream), I will take a break from streaming for a while until further notice.

Also, I will not do any other streams before GigaLem's pack.

I mentioned that I was going to do a stream on the contest levels today, but I have something that came up, so I won't be able to do the stream after all. I'm sorry for announcing this last-minute, but I hope I can stream them after the contest is over!

Here's Dirt! Beware - this background is not for vertical levels.

I also made this as a dedication to a certain forum member who made a wonderful Lemmings pack, has helped maintain the NeoLemmix website, and is now a forum Administrator.

I am deeply sorry and sad to hear that as well, Flopsy and Lucia. That must be very hard for both of you. As I said before, we are always here for you guys. You both have my prayers as well. Stay strong.

Mine as well. Sorry to hear what happened. We're all here for you, Flopsy.

I will be streaming this pack tomorrow at 7:30PM EST on Twitch. I will be streaming the levels in order, starting with the Quirky rank. Hope to see you there!