Go to Classified Files then press (X) on unlock to bring up a keyboard then type:
Effect Code Mission 1 KREUZLER Mission 2 SHEARER Mission 3 UBERDOOPER
Contributed By: HUGGY.
Enter these codes on the Main menu > Classified Files > Unlock screen:
Effect Code Toggle god mode TEAMBUDDIES Toggle infinite ammuntion BLASTRADIUS Unlock all missions KINGSLEY
Contributed By: bm3x.
To access the bonus hidden game first go to the uberdooper bonus mission. (The hidden tank battle mission that you get by typing UBERDOOPER in the Unclock code screen).
As the cutscene starts enter the following code (needs to be done in the first 4-5 seconds).
Hold Left Analgoue stick up, then press Square, Triangle, Circle, Triangle , Square, Circle.
You can skip the cutscene with 'X'
Bonus Game Instructions
Press x to walk and triangle to shift camera
Contributed By: zx7rp3.
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