I solved a certain old format contest level exploiting this behavior. This is still possible in new format NL though as the replay format didn't change.

Reproducing:

- Load a level.
- Assign a skill to a lemming.
- Assign a 2nd skill on the very next frame (for simplicity purposes) to another Lemming.
- Save the replay.
- Close NL and open the replay file with a texteditor.
- Look at the 2 skills assigned and change the frame of the 2nd skill to the frame of the first, while updating the 2nd Lemming's position to the position the Lemming had on the frame before:

Example:

Original file:

$ASSIGNMENT
  FRAME 85
  LEM_INDEX 1
  LEM_X 111
  LEM_Y 135
  LEM_DIR left
  ACTION builder
$END

$ASSIGNMENT
  FRAME 86
  LEM_INDEX 0
  LEM_X 209
  LEM_Y 151
  LEM_DIR right
  ACTION basher
$END

After editing:

$ASSIGNMENT
  FRAME 85
  LEM_INDEX 1
  LEM_X 111
  LEM_Y 135
  LEM_DIR left
  ACTION builder
$END

$ASSIGNMENT
  FRAME 85
  LEM_INDEX 0
  LEM_X 208
  LEM_Y 151
  LEM_DIR right
  ACTION basher
$END

(I've attached an example file where the first 2 assignments are a double assign)

NL will accept and load the edited file and assign both skills in the same frame to their respective Lemmings.

Fix proposal:

If we have multiple assignments in the same frame in a replay file: Only execute the first assignment, while all other assignments in the same frame will be ignored.

This fix will therefore trigger no NL error and it won't be noticable. This is only discovered anyways if a user deliberatly edits a replay file to do this, as double assignments are otherwise forbidden in the player.

causing the occasional lemming to fall through a trampoline and die.

There is the rule that trampolines only can handle 1 lemming at a time (at least I think), like a fast trap that can only handle up to a certain density of lemmings before letting some past. That is also the reason why you can have problems on Sport 1 getting a gold standard.

I've found 2 possible solutions. One is quite timing dependent though.

Maybe this is more likely to be intended.

The new update wasn't released yet. So the change still needs to be implemented.

Thanks for the info regarding Clammings! I tried to figure this out via SEB Lems, which had one of namida's custom skill panels in Old Formats, but resorted to the standard green again in New Formats.

I could offer you, after I'm done with creation and stuff, a tester version of United. It will use custom panels, rank signs, menu signs and logo. So you could see how I've done it as well.

Also Reunion has the LP IV panels again, if you want even more examples.

For me it's simple: Every NeoLemmix level is Lemmings. Doesn't matter the quality.

I don't care for thing like having the exact same physics, main menu screen or so. That can all change. I also embrace well made new tilesets that change things up and have a unique feel. That's also a reason why I don't care much about a changed preview screen, but care about a customisable main menu to give my content a unique new touch.

I would go as far and say the original games aren't the real Lemmings for me, it's NeoLemmix. I think they got the focus wrong on the execution and not the puzzle itself. We are not only doing a revival of the past, but also a reshaping.

An ideal level pack for me doesn't have to feel like it was from DMA, in contrast straying away from the DMA formular is beneficial. The pack should challenge me, teach me new things that I can use myself then and bring me to my mental limits in the final rank.

While I also feel nostalgic for the old games, I don't think they are that good compared to most custom stuff here and I will gladly choose the custom content over the original one.

So if anyone can tell me where in the NeoLemmix player the information for placement of level-preview-screen text (number of lemmings etc.) is stored, maybe I can re-arrange that in my own player so that - kind of like with the aforementioned restriction of the number of tilesets used - it looks and feels more like original Lemmings again.

Good thing the screen is about to change as well.

Also I don't think that this being 100% user customisable will be possible. As I suspect this is engrained in the Delphi code itself, but again that will be up to Nepster to clarify.