Type in codes:

RDELVIS	God Mode!!!
RDALL	Gives you all the items and full health.
RDCLIP	Lets you walk through things..
RDDEBUG	Toggles debug mode.
RDFUCKNGO#??	Takes you to episode # and map ??.
RDGUNS	Gives you all the weapons.
RDINVENTORY	Gives you all inventory items.
RDITEMS	Gives you all the items.
RDKEYS	Gives you all ht keys.
RDMONSTERS	Toggles monsters on or off.
RDRATE	Shows you your current framerate.
SHOWMAP	Shows you the full map.
RDSKILL#	Changes your skill level. (1-4)
RDUNLOCK	Toggles all the locks.
RDVIEW	Chase plane view.