Transformers: Revenge of the Fallen Cheats for PlayStation 2
At the 'Main' menu select 'Cheat Codes' and enter the following codes to unlock the corresponding playable character for Multiplayer.
Unlock Gold Megatron:
Press Down, Up, Right, RIght, Left, Up.
Unlock Gold Optimus Prime:
Press Up, Down, Left, Left, Right, Down.