You meet a crucified revenant at several points in the game. The Red Hall of Cages area is a huge torture chamber, with enemies consisting of prisoners and torturers.
The Undead feature prominently. The game is thick with various flavours of zombies and ghosts. *SPOILER* A trio of undead deities feature as a bossfight.
Both endings are sad. In one, you kill the false god and take his place, your body gets crucified and your corrupt soul haunts the Overlord armor. In the other, you fall down a well and drown.