D.O.G.

Type following codes during a mission: 

mmghost        - NoCollision Mode
mmlevitate     - NoClipping Mode (drive thru scenery)
mmtriggerhappy - AMMO refill
mmfaithnomore  - God Mode
mmferrari      - New Buggy available
mmactivate     - Mission Objectives Completed
mmjustice      - Destroy all Enemies
mmparanoide    - BoosterPack for your Buggy