Aliens Vs Predator: Requiem Cheats for PSP
To perform the Spine Buster play as a Predator and when an alien runs at you press the X button when indicated (this may not work every time).
When the indicated levels have been cleared these Predator weapons will become available options in the game.
Unlock Hand Cannon:
Unlock Shoulder Cannon (Single and Dual):
From the start (Single) and after upgrading (Dual)
The Crash Site (Route 1 - Underground)
Unlock Throwing Disc:
Forest (Route 2 - Industrial)
Cemetery (Route 3 - Suburban)