Type in the following codes anytime during gameplay:
IAMAPOOPHEAD - God mode
IDKFA - Just do it
SCOOBYSNACK - Gain 200% Energy
WHOOPDANG - Gain all weapons & ammo
BODYBAGS - ???
BURGER - ???
CHOW YUN FAT - ???
CRYPTO - ???
EDGE - ???
GARYLAKE - ???
JOHN WOO - ???
MAD DOG - ???
OPENSEZME - ???
STRYDER - ???

Type in the following code to jump to that level:
1 - SIDEOUT
2 - GEKKO
3 - TOPFLITE
4 - SUNDEVIL

Stage Select:
Select Start game at the title screen. When the blue screen with the Russia mission appears, press right to move
to the japan mission. Before the information appears on the screen, press and hold X and diagonally Down-Left.
To choose one, just let go of the buttons at the point on the globe that you want to play. Just look at the countries
as they pass on the globe, and with the correct timing, you will be able to let go and start the game on the mission
of your choice. After choosing, you will see your objectives then begin your mission.