There are quite a few things that you can unlock in Twisted Metal for the PS3.
Here is the list of unlockables found so far. If you find more, please leave me comments below and I’ll add them.
Unlockable Energy Abilities
Absorption Shield Beat Mr. Grimm Event #3 (Right + Triangle to perform ability)
Rear Freeze Beat Sweet Tooth Event #3 (Up + Triangle to perform ability)
Super Mine Beat Mr. Grimm Event #5 (Down + Triangle to perform ability)
Unlockable Sidearms
Laser Beat Dollface Event #5
Laser Pistol Complete Story Mode on Twisted difficulty
Magnum Revolver Beat Sweet Tooth Event #4
Rockets Beat Dollface Event #2
SMG Beat Sweet Tooth Event #1
Twelve Gauge Shotgun Beat Mr. Grimm Event #4
Unlockable Skin Packs
Kamikaze Complete Story Mode on Normal difficulty
Stars and Stripes Complete Story Mode on Hard difficulty
Unlockable Vehicles
Crimson Fury Beat Dollface Event #1
Darkside Beat Mr. Grimm Event #6
Juggernaut Beat Dollface Event #3
Meat Wagon Beat Mr. Grimm Event #1
Reaper Beat Sweet Tooth Event #2
Roadkill Beat Sweet Tooth Event #5
Shadow Beat Dollface Event #4
Talon Beat Sweet Tooth Event #6
Vermin Beat Mr. Grimm Event #2
Warthog Complete Story Mode on Twisted difficulty with all gold medals