The Dark Catacombs is the fourth mod by Sandy. As with his previous mods, it was based on shareware Wolfenstein.
Moving away from Project Eisenritter for a change, Sandy instead based this mod on the then-current Halls of Stonehenge, without proper permission from MajikMonkee. This did not go unnoticed on the DieHard Wolfers message board.
The mod contains 7 levels, but unlike his previous three mods, the seventh level was not merely a jump; it actually contained a challenge of some sort to get to the jump.