Doom 2 | Crusader v1.3, map 08: Sludge Systems
This one gave me some trouble navigation-wise, but I probably wasn't paying enough attention. Either way, it's a fun map with more big fights and some weird little pain elemental-type characters!
Sourceport: DSDA-Doom 0.26.2: https://github.com/kraflab/dsda-doom
Maps: Crusader v1.3 - https://www.doomworld.com/forum/topic/139104-crusader-dsdhackedmbf21/
Given Crusader comes with its own weapons and plenty of monsters, you might want to play it without any gameplay-altering mods.
Mod list:
Simple DSDA-Doom HUD - https://www.doomworld.com/forum/topic/139048-simple-dsda-doom-hud/
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