Unlimited Necroplasm:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Down, Left, Up, Right. Spawn will speak to confirm correct code entry.

No blood:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Up(4). Spawn will speak to confirm correct code entry.

Unlock all comics:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Right, Left(2), Up. Spawn will speak to confirm correct code entry.

Level select:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Left(2), Right(2). Spawn will speak to confirm correct code entry.

All weapons:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Left, Right, Left(2). Spawn will speak to confirm correct code entry.

Unlimited ammunition:
Press Start to pause game play, then quickly press Up, Down, Left, Right, Up, Left, Down, Right. Spawn will speak to confirm correct code entry.

Unlimited health and Necroplasm:
Press Start to pause game play, then quickly press Up, Down, Left, Right(2), Left, Down, Up. Spawn will speak to confirm correct code entry.

Alternately, press Start to pause game play, then quickly press Up, Down, Left, Right, Up(3). Spawn will speak to confirm correct code entry.

Get Encyclopedia
Press START to pause the game and press quickly: Up, Down, Left, Right, Left, Right, Up, Down.

How You Kill the (Claw Demon)
Press back X and then once he is on his back you can kill him easily.

How To Beat Violater
Run around the rafters and shoot him with everything you've got. If you run out of ammo, just use your chains. Don't fall on the floor though, because you'll get hurt.

Really Easy Souls
Go to the one level with three rooms ending in a spider tank. After you beat the spider tank the token will appear to finish the level. Instead of getting it go back one room and kill the robot drones and collect all the ammo and if they give you. Then go back another room. The soldiers will be there for you to kill. Beat them and get whatever they drop. Then the robot drones will attack you. Kill them and then go forward one room. The robot drones will be there again. You can go back and forth getting as many souls and technique points as you want. Then whenever your done you can just go to the token because you already beat the spider tank.

Level Select
Once you beat the game, go back to the main screen and there under bonus features there will be a new feature allowing you to select what mission you want to play.

Defeat Bulldozer Boss
Rule 1: Don't get close to it after killing the bezerkers.
Rule 2: Have your target locked on to the bullzozer right before the bezerkers show up and as the arm raises, jump up in the air and blast away at the eye with the shotgun.
Rule 3: If you have no shotgun ammo, then try the other guns.
Rule 4: When fighting the bezerkers, don't let them surround you, do combo attacks and jump attacks.
Rule:5: Repeat over and again until the thing is dead.