According to the unused corresponding achievement file, Sisters Vis would have been unlocked by beating Sheol 10 times. Marked Skulls are an unlockable obstacle through A Secret Exit.Ī boss version of the Vis enemy that could have appeared in Sheol. There are several colored versions of certain destructibles, which could have served a purpose similar to tinted rocks. Half Soul Hearts are an unlockable pickup. Half Soul Heart and Black Heart pickups are in the game files, but they cannot be found in-game. Activate Curse of Darkness for the rest of the floor.
They are fully functional and can do the following things:
Pressure plates can be found in the game files and could have served as another type of obstacle.
3.1 Unused Ultra Greedier Sprites and Animation.