All creatures, building, traps
At the main menu screent type: please give all
Bonus Stage
There are several bonus stages in Dungeon Keeper, but one of them can be found without doing anything. To access it, set your PC's date to any day with a full moon then start the game. The bonus stage will appear as a flag with a circle in it.
Modify Cheat
Go into the data file, then open up the creature file and you can change
information about creatures and spells around. Ex: You can change the imp
spell to where imps cost nothing.