Transformers: The Game

All missions
At the menu with the "Campaign", "Bonus", and "Options" selections, press Down, Up, Left, Right(3), Up, Down to unlock all missions, including the two Cybertron missions. If you entered the code correctly, the screen will flash.

Cybertron missions
At the menu with the "Campaign", "Bonus", and "Options" selections, press Right, Up(2), Down, Right, Left(2) to unlock two Cybertron missions. If you entered the code correctly, the screen will flash.

Play as Generation 1 Jazz
At the menu with the "Campaign", "Bonus", and "Options" selections, press Left, Up, Down(2), Left, Up, Right to unlock Generation 1 Jazz. If you entered the code correctly, the screen will flash. Select the "Bonus Features" option, then choose the "Generation 1" selection to use the new appearance.

Play as Generation 1 Cartoon Megatron
At the menu with the "Campaign", "Bonus", and "Options" selections, press Down, Left(2), Down, Right(2), Up to unlock Generation 1 Cartoon Optimus Prime. If you entered the code correctly, the screen will flash. Select the "Bonus Features" option, then choose the "Generation 1" selection to use the new appearance. Alternately, collect all the Decepticon secret icons in the Decepticon campaign.

Play as Generation 1 Cartoon Optimus Prime
At the menu with the "Campaign", "Bonus", and "Options" selections, press Down, Right, Left, Up, Down(2), Left to unlock Generation 1 Cartoon Optimus Prime. If you entered the code correctly, the screen will flash. Select the "Bonus Features" option, then choose the "Generation 1" selection to use the new appearance. Alternately, collect all the Autobot secret icons in the Autobot campaign.

Play as Generation 1 Robo-vision Optimus Prime
At the menu with the "Campaign", "Bonus", and "Options" selections, press Down(2), Up(2), Right(3) to unlock Generation 1 Robo-vision Optimus Prime. If you entered the code correctly, the screen will flash. Select the "Bonus Features" option, then choose the "Generation 1" selection to use the new appearance. Alternately, successfully complete the Autobot campaign.

Play as Generation 1 Starscream
At the menu with the "Campaign", "Bonus", and "Options" selections, press Right, Down, Left(2), Down, Up(2) to unlock Generation 1 Starscream. If you entered the code correctly, the screen will flash. Select the "Bonus Features" option, then choose the "Generation 1" selection to use the new appearance. Alternately, successfully complete the Decepticon campaign.

Infinite health
At the menu with the "Campaign", "Bonus", and "Options" selections, press Left(2), Up, Left, Right, Down, Right. If you entered the code correctly, the screen will flash.

Infinite ammunition
At the menu with the "Campaign", "Bonus", and "Options" selections, press Up, Down, Left, Right, Up(2), Down. If you entered the code correctly, the screen will flash.

No traffic, police, or military
At the menu with the "Campaign", "Bonus", and "Options" selections, press Right, Left, Right, Left, Right, Left, Right. If you entered the code correctly, the screen will flash. The only vehicles remaining will be parked.