X-Squad Cheats

At the Start screen press Triangle,
Square, Circle, Square, Triangle, Circle

At the title screen, press Circle(4), Triangle, Square(4), then start a new game. This results in a game with a level 3 shield, level 3 sensor, radar, no weight limit, master level of all weapons, 99 clips for each, and bonus points displayed when earned.
Game Shark Codes
Master Code (Must Be On) EC81EAE8 1456E60A
Infinite Health Level 1 4D3B9D20 1456E7AB
Infinite Shield Level 1 4D3B9D24 1456E7AB
Infinite Pistol Ammo 4D3C84FC 1456E79C

Super being rank:if you press square,o,triangle you get all weapons infinant ammo for each gun,god mode invisibility new weapon called the air lock,and fly mode

At the title screen, press Circle(4), Triangle, Square(4), then start a new game. This results in a game with a level 3 shield, level 3 sensor, radar, no weight limit, master level of all weapons, 99 clips for each, and bonus points displayed when earned.