At the difficulty selection screen, press [Tab] + [Ctrl]. Then type: ROBISAGOD to enable cheat mode. To activate a cheat, enter its corresponding code below.

Cheat	Code
All weapons	KICKASS
Blood mode	GIVEBLOOD
Invincibility	BEAGLE
Level skip	GETMEOUT
Rescue all hostages	RESCUE
Reveal hidden areas	INFRARED
View end sequence	GEEWHIZ