In order to use the platinum cheats below, you'll need to have collected a certain number of Platinum Medals, and then you'll be able to enter the codes. Below is a list of cheats, and the amount of Platinum medals needed for each cheat to work:
All Weapons: Circle, Triangle, X, X, Circle - 17
Cloak: Circle, Triangle, X , Triangle, Square - 13
Double Ammo: Circle, Circle, X, Circle, Triangle - 7
Double Damage: Circle, Triangle, Triangle, Square, Circle - 9
Full Ammo: Circle, Circle, Triangle, Square, Square - 11
Full Battery: Circle, Triangle, Triangle, X, Circle - 15
Improved Battery: Circle, Square, Square, X, Circle - 5
Platinum Gun: Circle, Square, Square, Circle, X - 27
Slow Motion Driving: Circle, Square, Triangle, X, Triangle -
Unlimited Ammo: Circle, X, Square, X, Circle - 23
Unlimited Battery: Circle, Square, Circle, Square, Triangle - 19
Cheat: Golden Gun:
At the pause screen, enter CIRCLE, TRIANGLE, X, CIRCLE, TRIANGLE
Unlockable: Arena Mode:
Play through the cooperative missions and acquire multiplayer points by completing the optional objectives.
Unlockable: Characters and Bonus Arenas:
Unlock the following by earning the appropriate number of multi player points, earned by completing objectives in co-op mode.
Hint: Loads of Tips:
Hint: No Medals With Cheats:
If you activate a cheat, such as the Golden Gun, you will not be awarded a medal for completing the mission, no matter how well you do.
Hint: Regain Health:
Crouch, by pressing R2, to slowly refill your health.
Hint: Train Chase Dirt Bike:
At the beginning of the "Train Chase" mission, instead of taking a left to Bond's Porsche, turn right into a small room. Inside, you'll find a dirtbike and a slightly different path through the level.