Navigate to "Cheat Codes" from the Main Menu and enter these codes for the desired effect. These cheats will disable Trophies.

R3, X, SQUARE, L3, SQUARE, SQUARE - Invincibility
L1, TRIANGLE, L1, CIRCLE, SQUARE, SQUARE - All Upgrades
CIRCLE, L3, SQUARE, R3, X, TRIANGLE - Unlimited Turbo
L1, CIRCLE, L1, X, SQUARE, R3 - Always in Overdrive Mode
TRIANGLE, SQUARE, CIRCLE, R3, X, TRIANGLE - Extra Energon (4X from defeated enemies)
TRIANGLE, TRIANGLE, CIRCLE, X, SQUARE, L1 - Increased Enemy Accuracy
L1, TRIANGLE, X, TRIANGLE, R3, R3 - Increased Enemy Damage
CIRCLE, SQUARE, L1, CIRCLE, R3, TRIANGLE - Increased Enemy Health
TRIANGLE, TRIANGLE, R3, X, L1, TRIANGLE - Increased Weapon Damage in Root Form
TRIANGLE, CIRCLE, R1, SQUARE, R3, L3 - Increased Weapon Damage in Vehicle Form
SQUARE, SQUARE, TRIANGLE, L3, TRIANGLE, L3 - Low Gravity Mode (Everyone jumps higher and longer)
SQUARE, L3, R3, L3, R3, R1 - Lower Enemy Accuracy
SQUARE, L3, R3, L3, R3, R1 - Lower Enemy Accuracy
R3, X, L1, CIRCLE, R3, L1 - Melee Instant KilL3
R3, SQUARE, R3, R3, SQUARE, X - No Special Cool Down Time
L3, SQUARE, X, L3, TRIANGLE, L1 - No Weapon Overheat
R3, L1, L1, TRIANGLE, SQUARE, X - Play as Autobot Protectobot Scout MP (Singleplayer -Does not work in Deep 6)
SQUARE, TRIANGLE, SQUARE, L1, X, L1 - Plays as Decepticon Seeker Warrior MP (Singleplayer)
CIRCLE, CIRCLE, R1, CIRCLE, X, L3 - Special KilL3 Only
R3, TRIANGLE, X, TRIANGLE, L3, L1 - All Cairo Missions and Zones
SQUARE, R1, TRIANGLE, CIRCLE, X, L1 - All Deep SiSQUARE Missions and Zones
R3, L3, R1, X, CIRCLE, SQUARE - All East Coast Missions and Zones
TRIANGLE, L3, R3, L1, TRIANGLE, X - All Shanghai Missions and Zones
L1, R1, R3, TRIANGLE, R3, CIRCLE - All West Coast Missions and Zones

Mr. BotsteinUnlockable: Golden Bots for Multiplayer
Navigate to "Cheat Codes" from the Main Menu and enter the codes below (using the D-pad) for the desired gold Transformer:

Gold Megatron - DOWN, UP, RIGHT, RIGHT, LEFT, UP
Gold Optimus Prime - UP, DOWN, LEFT, LEFT, RIGHT, DOWN

RevengeIsNear Unlockable: Generation 1 Starscream
Navigate to "Cheat Codes" from the Main Menu and enter this code for Generation 1 Starscream: CIRCLE, X, CIRCLE, R1, TRIANGLE, R1