Driver: Parallel Lines (PS2)

Super Cheats
Enter the following on the cheats menu:

GUNBELT ... Infinite ammunition.
 GUNRANGE ... Unlock all weapons.
 ZOOMZOOM ... Infinite nitrous.
 ROLLBAR ... Cars are indestructable.
 TOOLEDUP ... Upgrades cost nothing.
 CARSHOW ... Unlocks all vehicles.
 IRONMAN ... Player invulnerability.
 KEYSTONE ... Police vehicles vulnerable.

Unlockables
 Double Ammunition Capacity: You must collect 30 Stars
 Double Car Durability: You must collect 40 Stars
 Free Vehicle Upgrades: You must collect 50 Stars
 Health Increase: You must collect 10 Stars
 Nitrous Increase: You must collect 20 Stars 

Extras
To unlock things like the Atlus Racer, Negotiator Vehicle, Ram Raider and the 'Then & Now Change' Option, is really quite simple when written on a page: simply finish the game. In practice however, this can be quite hard. Best of luck.

F70 Weapon
Finish the mission "Tailgate".

Gangster Weapon
Finish the mission "Tailgate".

Service 9 Weapon
Finish the mission "Last Chance".

L15 Weapon
Finish the mission "Jail Break".

Unlockable Odometer Modes
 Bodysnatcher - Accumulate 666 miles on the Odometer
 Night Night - Accumulate 700 Miles on the Odometer
 Shortest Day - Accumulate 800 Miles on the Odometer
 Far Out - Accumulate 900 Miles on the Odometer