Unlockable: Warlord Car
To unlock the Warlord car (also known as the most awesome car in Full Auto, with full armor and speed stats), you must earn a Full Auto medal for the Armageddon event in the Warlord career mode chapter.

When you chose the weapon combo, choose the assault weapons set the machine guns to level 3 and the mines to level 1. Hang back at the rear of the pack, kill all your opponents, and finish first you should be able to unlock the Warlord which is the best car in the game.
Unlockable: Enforcer Cop Car
To unlock the Enforcer cop car, simply complete the Swift Justice event in the Speed Kills career mode chapter.
Unlockable: Phantom
Earn any medal in the Bayside Brawl event.
Unlockable: Wraith
Earn any medal in the Killer Curves event.
Unlockable: Streamline
Earn any medal in the Shore Leave event.
Unlockable: Demon
Earn any medal in the Rod Rage event.
Unlockable: Outlaw
Earn any medal in the Toll 'N' Thunder event.
Unlockable: Vulcan
Earn any medal in the Catch My Drift event.
Unlockable: TEC
Earn any medal in the Over/Under event.
Unlockable: Magnus
Earn any medal in the Heads Up event.
Unlockable: Opulent
Earn any medal in the Laps of Luxury event.
Unlockable: Ardent
Earn any medal in the Boxed In event.
Unlockable: Kodiak
Earn any medal in the Monster Mash event.
Unlockable: Honcho
Earn any medal in the King of Bling event.
Unlockable: Guardian
Earn any medal in the Short Stretch event.
Unlockable: Roughneck
Earn any medal in the Trail Breaker event.
Unlockable: Hitman
Earn any medal in the Tommygunner event.
Unlockable; Rampart
Earn any medal in the Raging Bull event.
Achievement: Ambush series 20pts
Survive every event in this series.
Unlockable: Dominator series 20pts
Survived every event in this series.
Unlockable: Enduro series 20pts
Survived every event in this series.
Unlockable: Five in a Row 15pts
Killed five Opponents in rapid succession.