Enter the following codes at the 'Main' Menu to begin a new game with the corresponding rank and specieal features that come with it like extra weapons and ammo.

Unlock Lieutenant:
R1, L2, L1, R2.

Unlock Private:
Square, Circle, Triangle.

Unlock Sergeant:
Triangle, Circle, Square.

Unlock Captain:
Circle, R1, Circle, L1, Triangle, R2.

Unlock Colonel:
Triangle, Square, Circle, Square, Triangle, Circle.

Unlock Major:
L2, Square, R2, Triangle, L1, Circle, R1.

Unlock Master of X-Squad:
Circle (x4), Triangle, Square (x4).

Unlock General:
L1, L1, L2, L2, R1, R1, R2, R2.

Private rank :
At the title screen, press Square, Circle, Triangle, then start a new game. This results in a game with Michaels 9mmS, 99 clips, and bonus points displayed when earned.

Sergeant rank :
At the title screen, press Triangle, Circle, Square, then start a new game. This results in a game with no weight limit, Taylor M82, Michaels 9mmS, 99 clips, and bonus points displayed when earned.

Lieutenant rank :
At the title screen, press R1, L2, L1, R2, then start a new game. This results in a game with a level 2 shield, no weight limit, Taylor M82, Michaels 9mmS, 99 clips, bonus points displayed when earned, and a 10,000 point bonus when a level is completed.

Captain rank :
At the title screen, press Circle, R1, Circle, L1, Triangle, R2, then start a new game. This results in a game with radar, no weight limit, Taylor M82, Michaels 9mmS, 99 clips, and bonus points displayed when earned.

Major rank :
At the title screen, press L2, Square,R2, Triangle, L1, Circle, R1, then start a new game. This results in a game with a level 3 shield, Level 3 sensor, radar, no weight limit, Taylor M82, Michaels 9mmS, 99 clips, and bonus points displayed when earned.

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

General rank :
At the title screen, press L1(2), L2(2), R1(2), R2(2), then start a new game. This results in a game with a level 3 shield, level 3 sensor, radar, no weight limit, intermediate level of all weapons, 99 clips for each, and bonus points displayed when earned.

Master of X-Squad rank :
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.