Dropship

Select the "Classified Files" option at the main menu. Press X, then enter following codes:
TEAMBUDDIES - invincibility
BLASTRADIUS - infinite ammunition
KINGSLEY    - level select
KREUZLER    - bonus level 1
SHEARER     - bonus level 2
UBERDOOPER  - bonus level 3

Mini-game:
Enable the "Bonus level 3"code, then hold Left Analog-stick Up and quickly press Square, Triangle, Circle, Triangle , Square, Circle when the introduction sequence to the bonus level begins. Press X to stop the introduction sequence and the mini-game will begin. Press X to move and Triangle to change views during the mini-game.

 