Cheat List
To be able to reach the list of the available cheating you have to end the game at least in normal mode. Then they will be accessible from the menu extras.
Effect - Code
Charge link infinite - End the game in normal difficulty
First mortal blow - End the game in normal difficulty
Infinite spirit - End the game in normal difficulty
Invincibility - End the game in normal difficulty
Mode turbo - End the game in normal difficulty
Easy time challenge skull
Buy the first upgrade for the Hell-Cycle. When fighting Vengeance, make sure that you have the course memorized. During the fight, rapidly press Circle to fire your upgraded homing shots in a constant stream. If done correctly, his health will decrease quickly and you will get the time challenge skull.