Various Codes

Unlockable How to unlock
All normal and secret characters playable Complete the game and save. Load that save to start from the beginning with all characters selectable (including Boris and Black Alice) in any stage.
EASY difficulty Get 5 game overs in NORMAL difficulty and select it in the continue menu.
GOD mode Beating the game on VERY HARD. In this mode all skills are maxed out and available from the beginning, and the gunslinger gauge never runs out.
HARD CORE difficulty Beat the game in VERY HARD difficulty. In this difficulty you can't continue.
HARD difficulty Beat the game in any difficulty.
MAX mode Beat the game in HARD difficulty. In this mode you get more skill point from the start.
Secret cutscene Beat Crow's last boss in HARD difficulty. A new scene is added to the video after the fight.
VERY EASY difficulty Get 5 game overs in EASY difficulty and select it in the continue menu.
VERY HARD difficulty Beat the game in HARD difficulty.