Enter Square, Circle, Triangle, Circle, Square, X, Triangle, X at the cheats screen under the options menu to unlock all cheats.
Directors cut
Enter Square, X, Circle, Triangle, Circle, X, Square, Triangle at the cheats screen under the options menu.
Expert mode
Enter Square, X, Circle, Triangle, Circle, X, Sqaure, Triangle at the cheats screen under the options menu.
Funny message in multi-player mode
In the multi-player level "Watch Your Step", jump off of a cliff and fall. If you look upward quick enough, you will be able to see a hidden message spray painted on the bottom of the level. The message is "SUCKS TO BE YOU". An easier way to do this is to play on arena mode and die to become an observer. While in observer mode, move under the platform and read the message.
Gibby explosions
Enter Triangle, Circle, X, Square, Triangle, Circle, X, Square at the cheats screen under the options menu.
Level select
Enter Circle, Square, X, Triangle, Square, Circle, X, X at the cheats screen under the options menu.
Master code
Enter Square, Circle, Triangle, Circle, Square, X, Triangle, X at the cheats screen under the options menu. Alternately, Enter Triangle, Triangle, X, X, Square, Circle, Square, Circle at the cheats screen under the options menu.
Rain of fire
Enter Square, Square, Square, Square, Square, Square, Square, Square at the cheats screen under the options menu.
Rapid kills, accuracy, and bagman points
Select "Team Bagman" and go to the level "Relentless". Set the options as follows:
Weapons: Pistol to default, rail driver
Score limits: 500
More bots possible
No power ups
No reloads
Unlimited ammo
Difficulty: Easy or create some bots and make them easier and make their first liked weapon to pistol.
Have yourself alone in your team, and all bots are in the other.
Try to find the rail driver and the bag then go to the large room where is the large hole on the roof. Go to the little room on your left when you come from the little jump room. Next, stay as hidden as possible. The stupid bots will appear. Keep firing so that when the bots appear, they will freeze in place and cannot hit you. If you wait until at least four bots are stuck like that, you will have unbelievable performance.
Rapid Rails
Enter Circle, Square, Circle, Square, X, X, Triangle, Triangle at the cheats screen under the options menu.
Super health
Enter X, X, Square, Triangle, Square, Triangle, Circle at the cheats screen under the options menu.
Unlimited ammunition
Enter Square, Triangle, X, Circle, Square, Circle, X, Triangle at the cheats screen under the options menu.
Unlimited grenades
Enter Circle, X, Circle, Square, X, Circle, X, Circle at the cheats screen under the options menu.
Wacky deaths
Enter Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle at the cheats screen under the options menu.
Walking dead
Enter X, X, X, X, X, X, X, X at the cheats screen under the options menu.