Enter these codes while in a level without pausing. Enabling any cheats removes your ability to save your progress!
| Code | Result |
| Hold L1 & R1, then enter Square, Circle, Triangle, X, X | Code Entry Screen |
| After entering the "Code Entry Screen" Code, release R1 & L1, Hold R1 & L1 down again and enter Triangle, Square, Square, Triangle, X, Circle | Health Restore |
| After entering the "Code Entry Screen" Code, release R1 & L1, Hold R1 & L1 down again and enter Circle, Circle, Triangle, Square, X, Triangle | Infinite Ammo |
In the final part of the Der Flakturm mission, when you have to escape through the sewer, you will meet about six of the hard to kill elite machine gun soldiers. It is almost impossible to defeat them all. It is much easier to run past them all. Make sure you have at least three health bars. Once you climb the ladder the game is all but over.
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