Extra Goodies
At the aircraft carrier level, blow up all of the planes around you. There 
should be one big explosion. If you look close, a piece of the ship will be
missing. Go down in there and there will be a mini nuke, chaingun, and 
health. Then to get out go through the blue portal.

Invincibility:
Hold L1 + R1 + L2 + R2 and quickly press Left, Right(2), Circle, Square during 
game play in endurance mode.

Weapon eject:
Hold L1 and press X(2), Square during game play.

Shield:
Enable the "Instant Combo" option at the cheats screen. Then, hold R1 and press 
Triangle, Square, Triangle, Square during game play. This code may be repeated 
to increase its effect.

Buzzsaw:
Select the hard or very hard difficulty setting. Win Eliminator, Deathmatch, and 
Endurance ranks with the same character. 

City Canal level:
Successfully complete the Deathmatch level under the normal difficulty setting to 
unlock the City Canal level in multi-player and quick battle modes.

Downtown level:
Successfully complete the Eliminator levels under the normal difficulty setting to 
unlock the Downtown level in multi-player and quick battle modes.

Dual Carrier level:
Complete the Endurance, Deathmatch, and Eliminator modes with the same 
character under the hard or very hard difficulty settings to unlock the Dual Carrier 
level in multi-player and quick battle modes. 

Santa hats:
Set the system date to December 21 through December 25. 

 
Game Shark Codez: 
 
Master Code (Must Be On):
EC86C30C 1456E60A
 
99 Kills:
3CFE72A8 1456E788