Press enter, then type the following:

csmiltonEnable cheats - USE THIS FIRST

csammoFull ammo
csbackQuick reset from last Save
csessenceInfinte angel power
csgunsAll guns
cshaltStop time
cshealthFull health
cshostFlight mode
csitemsAll items
csportalView wireframe connections
csrosaryAll angelic powers
csshroudFull armor and health
csvanishKill all creatures
cswireWireframe level map
csyhwhGOD MODE!

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