Castle Dukenstein is a multiplayer-only map for Duke Nukem 64.
The level features a haunted mansion and low-lighting.
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.
The castle also contains many dark, hidden hallways and a dinner table set for cannibals.