Try loading the file in the legacy version. Not on the current one.

I get these errors on either version:

'Content/Talos/All_326589/Content/Talos/Levels/Nexus.wld' isn't signed with sufficient credentials (EDITOR)
Stream is signed with insufficient credentials. (Content/Talos/All_326589/Content/Talos/Levels/Nexus.wld)
One or more errors occurred during loading of 'Content/Talos/All_326589/Content/Talos/Levels/Nexus.wld'.

Are there any modding resources or documentation about modifying the game's world files? I'm not sure if it's possible to open the games .wld files with the editor.

Originally posted by PleasantPetrichor:

Are there any modding resources or documentation about modifying the game's world files? I'm not sure if it's possible to open the games .wld files with the editor.

Are you in the Croteam Discord? I think you might be more successful if you ask there. There are multiple people who have very deep knowledge about the game.

Originally posted by Silverfish003:

Originally posted by PleasantPetrichor:

Are there any modding resources or documentation about modifying the game's world files? I'm not sure if it's possible to open the games .wld files with the editor.

Are you in the Croteam Discord? I think you might be more successful if you ask there. There are multiple people who have very deep knowledge about the game.

I will try that! Thanks!

Okay, after some help from the discord I was able to load the nexus.wld file in the editor. From what I can deduce from the world editor and some of the script files, the Easter egg trigger is just after the very last elevator. When the player enters the detector hit box, the game checks to see if The Shepherd is still within the area they were stuck in at the beginning, and spawns the Easter egg if the check passes. However, there is a catch. The game enables the rising death barrier and spawns both The Shepherd and Samsara when you enter the first purple barrier after the spiral staircase. After a certain point (about 3 minutes and 20 seconds after passing the barrier) The Shepherd gets teleported to their next marker, which takes them out of the area that gets checked to see if they are still there. I can't find the code that teleports them to the marker, so I am not sure whether this is a bug or intended as a way of putting a time limit on the easter egg. The teleport seems to coincide with the game triggering the panels to start ripping away, so this also makes me unsure whether this is a bug or not. I did some tests and I found that the death barrier does kill The Shepherd and Samsara. Weirdly, if I move the marker within the area the game checks (so that he stays there when he teleports), The Shepherd can still be detected in the barrier even after their death. The Shepherd dies not long after they get teleported, so the teleport might be a way to prevent the check from passing if The Shepherd died. I'll have to see if I can find the code that teleports them to confirm that this is intended.

If you have problems with the rising death barrier you can simply jump around the first purple door when coming up from the stairs. If you don't "free" any of them they also won't be a problem later. https://www.youtube.com/watch?v=Bm3y7XshH-c this one seems to be pretty good for getting the easter egg.