Level skip
Pause the game and press Up, Down, Left, Right(2), Left.
Refill health
Pause the game and press Down(3), Left, Up, Right.
God mode
Pause the game and press Left, Left, Right, Right, Down, Up.
All weaponary
Press Left, B, Right, X, Right, Left, after you paused the game.
Every character
Press Left(2), B(2), Right, Left, B, after you paused the game.
Max ammo
Press Left, Right, B(3), Right, Left, after you paused the game.
Invisble
Press X, B, Left, Right, B, X, after you paused the game.
Back to Dreamcast