On the Main Menu screen, scroll to where it says Cheat Codes and enter the codes there.
Cheat Effect
Square, Square, Triangle, L3, Triangle, L3 Low Gravity Mode (Everyone jumps higher and longer)
L3, Square, X, L3, Triangle, L3 No Weapon Overheat
L1, O, L1, X, Square, R3 Always in Overdrive Mode
O, L3, Square, X, Triangle Unlimited Turbo
R3, Square, R3, R3, Square, X No Special Cooldown Time
R3, X, Square, L3, Square, Square Invincibility
Triangle, Square, O, R3, X, Triangle Extra Energon (ex: 4x frrom defeated enemies)
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, L1, O, R3, L1 Melee Instant Kills
Square, L3, R3, L3, R3, R1 Lower Enemy Accuracy
O, Square, L1, O, R3, Triangle Increased Enemy Health
L1, Triangle, X, Triangle, R3, R3 Increased Enemy Damage
Triangle, Triangle, O, X, Square, L1 Increased Enemy Accuracy
O, O, R1, O, X, L3 Special Kills Only Mode (Cannot kill enemies except with special kills)
Triangle, L3, R3, L1, Triangle, X Unlock All Shanghai Missions and Zones
L1, R1, R3, Triangle, R3, O Unlock All West Coast Missions and Zones
Square, R1, Triangle, O, X, L1 Unlock All Deep Six Missions and Zones
R3, L3, R1, X, O, Square Unlock All East Coast Missions and Zones
R3, Triangle, X, Triangle, L3, L1 Unlock all Cairo Missions and Zones
Square, Triangle, Square, L1, X, L1 Plays as Decepticon Seeker Warrior MP in Decepticon Based Single Player (only when mission begins, not in character select)
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.
L1, Triangle, L1, O, Square, Square Unlock and activate ALL Upgrades
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

Transformers Fallen Unlockables
Trophies

Complete each requirement to get the specified Trophy.
Unlockable How to Unlock
More Than Meets the Eye (Platinum) Earn ALL Trophies
Down to Chinatown (Bronze) Medal in all Autobot Shanghai Missions
West Side (Bronze) Medal in all Autobot West Coast Missions
Aerialbot Assault (Bronze) Medal in all Autobot Deep Six Missions
East Side (Bronze) Medal in all Autobot East Coast Missions
The Dagger’s Tip (Bronze) Medal in all Autobot Cairo Missions
One Shall Stand (Bronze) Defeat Megatron – Autobot Campaign
Now I’ve Seen It All (Gold) Unlock all Autobot Unlockables
Power to the People (Bronze) Purchase all Autobot Upgrades
Awesome Trophy! (Bronze) Eliminate 250 Decepticons – Autobot Campaign
Do the Math (Bronze) Acquire 2,000,000 Energon – Autobot Campaign
A True Autobot (Gold) Earn Platinum Medals on ALL Autobot Missions
Shanghai’d (Bronze) Medal in all Decepticon Shanghai Missions
West Coast For The Win! (Bronze) Medal in all Decepticon West Coast Missions
Rise of The Fallen (Bronze) Medal in Decepticon Deep Six Mission
Coast to Coast (Bronze) Medal in all Decepticon East Coast Missions