- For the Duke Nukem 3D mod, see Castle Dukenstein (DN3D mod).
The level features a haunted castle and low-lighting. The castle itself contains many dark, hidden hallways and a dinner table set for cannibals.
The level's name is a reference to Frankenstein. In reference to Frankenstein's monster, the level contains a room with a human-like shape on a table being pulsed with lightning, and thunder can be heard.