Press enter, then type the following:

csmilton	Enable cheats - USE THIS FIRST

csammo		Full ammo
csback		Quick reset from last Save
csessence	Infinte angel power
csguns		All guns
cshalt		Stop time
cshealth	Full health
cshost		Flight mode
csitems		All items
csportal	View wireframe connections
csrosary	All angelic powers
csshroud	Full armor and health
csvanish	Kill all creatures
cswire		Wireframe level map
csyhwh		GOD MODE!

Thanks to Revolution readers Riley Ferrante, Steven Reyes, and DeAdgUY_9!