bishop: Summons the Apogee announcer.
blood: Increases game gore.
glassjaw: One blow stun mode for both fighters.
helium: Different gravity.
invisible: Both fighters are invisible.
shadows: Shadows only.
stain: More game blood.
These codes must be entered on the menu screen:
xacman: Hidden minigame.
champs: Lets you choose any Champion as your fighter. (Registered version only).