While playing, press any of these sequences to activate the desired cheat.

Code      Effect
F10-E     End level
F10-G     Invulnerability
F10-I     99 ammo, all keys and items
F10-J     press  and mouse and you can fly
F10-N     no clipping, but you die, if you leave the level
F10-W     Warp to any level
F10-Z     Background turns grey and all secret ways will be visible
F10-D     Records a demo, pressing F10-D again to save the demo.