Answer:
These are the cheat codes for Driv3r:
1. All weapons: At the main menu, press R1, L2, Square, Circle, R1, R2, L2.
2. Unlimited ammo: At the main menu, press R1, R2, R1, R2, Square, Circle, Square.
3. Invincibility: At the main menu, press Square, Square, L1, R1, L2, R2, R2.
4. Immunity: At the main menu, press Circle, Circle, L1, L2, R1, R2, Square.
5. All missions: At the main menu, press L1, R1, L1, L2, Square, Square, Circle.
6. All vehicles: At the main menu, press L1, L1, Square, Circle, L1, R1, Circle.
Unlimited ammo, Invincibility, and Immunity will not work in Undercover mode.