Dungeon Keeper Codes -

Full moon bonus level:
Set the system date to any day on which a full moon falls and begin game play. The bonus level is designated by a flag that contains a circle.

All creatures, buildings, and traps:
Type please give all at the main menu.

Cheat mode:
Use the spell to transfer yourself into one of your minions during game play in the dungeon. Press [F12] while in the minion to display the cheat menu. Use the mouse to highlight a cheat.

Alternatively, use the spell to transfer yourself into one of your minions during game play in the dungeon and press [F11]. The screen will flash to confirm correct code entry. To use a creature's spells, press [Keypad Enter] and select a spell. Additionally, press [Keypad Enter] at the main screen during game play for another cheat menu. Unlimited free creatures can be created by using the "Place Creature Mode" option.

Multi-player mode vs. CPU:
Start the game with the -1player command line parameter to play against the CPU in multi-player mode.