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

Sergeant rank:
Press Triangle, Circle, Square at the main title screen, 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:
Press R1, L2, L1, R2 at the main title screen, 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:
Press Circle, R1, Circle, L1, Triangle, R2 at the main title screen, 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:
Press L2, Square,R2, Triangle, L1, Circle, R1 at the main title screen, 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:
Press Triangle, Square, Circle, Square, Triangle, Circle at the main title screen, 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:
Press L1(2), L2(2), R1(2), R2(2) at the main title screen, 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:
Press Circle(4), Triangle, Square(4) at the main title screen, 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.

Hint: Defeating the Flamethrower Boss:
When he uses his flame gun, always stay away from it as it can set you alight. Kill any guards who jump down, then face him again. Once his yellow bar is empty, he will die.

Hint: More bonus points:
Shoot all the environment-like computers, explosive barrels, cabinets, etc.

Hint: Buying weapons:
Press the acquire button and select "Weapons". You can get a rocket launcher, flame gun, assault rifle, and sniper rifle including a grenade gun.