Please god - God Mode
please refresh - Fills Up Energy
please fly - Fly Mode
please ghost - No Clipping Mode
please tellall - See All Messages
please giveall - All Weapons & Ammo
please killall - Kill All Enemies on Level
please open - Open All Doors
please invisible - Invisibility
The ghost mode is the most needed for me, because with it you can fall anywhere, you'll just fly out. EnJoy!