By this point, I am going to assume that all of the Multiplayer levels are going to take a SIngleplayer level and retexture it as well as change the placement of Weapons and Ammo. Of course, with nobody really caring about this pack, they could have gotten away with it if it wasn't for the meddling Deathstalker. This level is thus a redux of the classic Earth's Crust/Entering Devil's Watchman combo.
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Underworld Bario is a Multiplayer level in Q2. This level has the same geometry as Entering...