Enter at the menu that has campaign and bonus features listed:
Code Effect Down, Left, Left, Down, Right, Right, Up G1 Megatron Down, Right, Left, Up, Down, Down, Left G1 Optimus Up, Down, Left, Right, Up, Up, Down Infinite Ammo. Left, Left, Up, Left, Right, Down, Right Infinite Health - Invincibility left, up, down, down, left, up, right Jazz G1 skin Right, Left, Right, Left, Right, Left, Right No vehicle's running on the street and no tank's/cop's attack down, down, up, up, right, right, right Robovision Optimus Prime skin right, down, left, left, down, up, up Starscream G1 skin Down, Up, Left, Right, Right, Right, Up, Down Unlock All Mission Right, Up,Up,Down, Right, Left,Left Unlocks Bonus Cybertron Autobot And Cybertron Decepticon Missions.
Optimus and Megatron skins
Unlockable How to Unlock G1 Jazz Complete all Decepticon and Autobot Sub Missions G1 Megatron Collect all the Decepticon symbols G1 Optimus Prime Collect all the Autobot symbols G1 Starscream Complete Decepticon Campaign RoboVison Optimus Prime Complete the Autobot campaign
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