Quake 3 - Revolution cheats and cheat codes for Playstation 2

Skip Level:
During a game play, hold L1 + R1 + R2 + Select and press X, Circle,
Square, Triangle, X, Circle, Square, Triangle.

Unlock two bonus characters and level
Finish campaign mode on the "I Can Win" difficulty mode.

Pause in multi-player mode
There is no pause option in multi-player mode.
But you can stop the game play with the following trick:
Press Start, then highlight "Quit" and push X.
It will not quit unless you select "Yes".
To continue the game, select "No".