Level select:
To unlock the “Relive Episode” level select option, enter the following sequence of buttons at the main menu or during game play: Up, Up, Down, Down, Left, Right, Left, Right.
Infinite ammunition:
To activate infinite ammunition, enter the following sequence of buttons at the main menu or during game play: Up, Down, Left, Right, Up, Down, Left, Right.
Completion bonuses:
Complete the game to unlock the “Relive Scene” level select option. You will also unlock the bonus level “Release Therapy”. In “Release Therapy”,? you will play as Leo.
Watermark 20:
Press C, Z, Z, C, C, Z at the main menu or during game play. The full effect of this code remains unknown.
Familiar face:
Make you way to the door where the guard tells you he will not let you in because you are not a familiar face. Turn around and go off the stage. Climb up the steps on your left. Then, go up the stairs on that side. Move up the stairs until reaching the top. On the right side down the hallway is a case on the wall. Inside the case is an ax. Use the ax on a person or body. Executions immediately detach a head, where as hacking at a corpse requires a few swings. Pick up the head. Run back to the door and equip the head as a weapon. Go to the door and press [Action]. The guard will let you in.