Well you made me look, and while yes it is actually present in Redemption's files, named "r-cultistlair", in 'terrestrial_worlds.config.patch' the only new dungeon what's added by it is the "r-USCMbunker", the re-converted marine version, which you can see on like the second screenshot of their Workshop page.

Guess saving it for later or something, once they add it in there of course will be dublication, but for now it's all fine. And unsubbing from this mod won't break anything anyways except for the More Planet Info icon and text, as the dungeon this mod spawns 'as-is' already exists inside the game files since forever.

pretty sure Project Redemption also re-adds this dungeon

Good to know that we're the only original gangsters on the block then haha

Looks like FU already has their own version, but slightly different lol. https://frackinuniverse.miraheze.org/wiki/File:Cultistlair.jpg

I... also just guessed...

That mod's so big it wouldn't be that unlikely though really.

Wait, so FU does bring back this dungeon? I don't even know myself lol. I was just guessing lmao.

I guess they do, lol. Honestly didn't even consider checking beforehand, just went straight in.
Project Redemption seems to revert it back into the marine version though. And with FU, while it is popular, not everyone is running it (like myself) so there's no real harm in doing things in parallel.

Doesn't PR or other mods like FU reintroduce this dungeon already?