- Playstation 2
Extra Options
At the Press Start screen press Triangle Square Circle Left Square Triangle Square Circle Left Square all within three seconds.
Stage Select
First enter the code above Extra Options. Then at the Press Start screen press Left Right X Triangle Left Up all within three seconds.
Nakomi Mode
At the Press Start screen press Up Up Down Down Left Right Left Right X Circle all within three seconds.
Big Head Player
At the Press Start screen press Square Circle Circle Square Up Square Circle Circle Square Triangle all within three seconds.
Big Head Aliens
At the Press Start screen press Square Circle Circle Square Up Square Circle Circle Square X all within three seconds.
Turbo Mode
At the Press Start screen press X Square Triangle Circle X Square Triangle Circle L2 R2 all within three seconds.
Grayscale Graphics
At the Press Start screen press X X Triangle Triangle Square Square Circle Circle all within three seconds.
Sepia Graphics
At the Press Start screen press Left10x within three seconds.