Cheat List
Entry Location:
Navigate to "Cheat Codes" from the Main Menu and enter these codes for the desired effect:

L1, O, L1, X, Square, R3 - Always in Overdrive Mode
Triangle, Square, O, R3, X, Triangle - Extra Energon (ex: 4x frrom defeated enemies)
L1, R1, R1, X, O, Triangle - G1 Colors Ironhide (Single Player only)
O, X, O, R1, /\, R1 - G1 Starscream
Down, Up, Right, RIght, Left, Up - Gold Megatron
Up, Down, Left, Left, Right, Down - Gold Optimus Prime
Triangle, Triangle, O, X, Square, L1 - Increased Enemy Accuracy
L1, Triangle, X, Triangle, R3, R3 - Increased Enemy Damage
O, Square, L1, O, R3, Triangle - Increased Enemy Health
Triangle, Triangle, R3, X, L1, Triangle - Increased Weapon Damage in Robot Form
Triangle, O, R1, Square, R3, L3 - Increased Weapon Damage in Vehicle Form
R3, X, Square, L3, Square, Square - Invincibility
Square, Square, Triangle, L3, Triangle, L3 - Low Gravity Mode (Everyone jumps higher and longer)
Square, L3, R3, L3, R3, R1 - Lower Enemy Accuracy
R3, X, L1, O, R3, L1 - Melee Instant Kills
R3, Square, R3, R3, Square, X - No Special Cooldown Time
L3, Square, X, L3, Triangle, L3 - No Weapon Overheat
R3, L1, L1, Triangle, Square, X - Play as Autobot Protectobot Scout MP in Autobot based Single Player (only when mission begins, not in character select) Does not work in Deep 6.