- Activate Cheats
Enter the following code at the 'Cheats' sub-menu, which is found at the main screen by going to 'Extras', then 'Cheats':

YZWZYXWX

This will unlock all in-game cheats. It has to be 'activated' by putting a checkmark next to it. You can also access this menu during game play by pressing [Esc], then going to 'Cheats'. The cheat options are as follows:

Infinite Ammunition	Self-explanatory.
Gibby Explosions	Explosions make everything in its path gib.
Super Health	Health quickly regenerates over time.
Reign Of Fire	All weapons make the target burst in flames after they are shot.
Gibby Ammo	Shoot one round and the victim gibs.
Explosive Personality	When pressing [Use] (default E) on someone, they gib.
Rapid Rails	RailGun shoots very fast.
Infinite Grenades	Self-explanatory.
Extra Chunky	Every time you shoot an enemy, you get a gib part (only visually with no hole).
Walking Dead	Makes everyone resemble zombies.
Wacky Deaths	When shot in front, some enemies you kill die as if hit hard in the stomach; when shot in back they look like they tripped on something.

- FMV sequences
After clearing a level, you will be awarded the FMV sequence for that level plus another movie. Completing level 1 unlocks a spoof interview with characters from Summoner 2 talking about the Red Faction games. Completing level 2 unlocks a behind-the-scenes FMV sequence.