Enter during a mission with the associated character

Left, Up, Down, Down, Left, Up, Right - Jazz
Down, Down, Up, Up, Right, Right, Right - Optimus Prime
Right, Down, Left, Left, Down, Up, Up - Starscream

 

Various Codes

Insert the passwords on the main menu (where campaigns can be selected) to unlock the following:

* G1 Jazz Skin - Left, Up, Down, Down, Left, Up, Right
* G1 Megatron Skin - Down, Left, Left, Down, Right, Right, Up
* G1 Optimus Prime Skin - Down, Right, Left, Up, Down, Down, Left
* G1 Starscream Skin - Right, Down, Left, Left, Down, Up, Up
* No Vehicles, Military, or Police - Right, Left, Right, Left, Right, Left, Right
* Robovision Optimus Prime Skin - Down, Down, Up, Up, Right, Right, Right
* Unlock All Missions - Down, Up, Left, Right, Right, Right, Up, Down
* Unlock both Cybertron Missions - Right, Up, Up, Down, Right, Left, Left
* Unlock Unlimited Ammo - Up, Down, Left, Right, Up, Up, Down
* Unlock Unlimited Health (Invincibility) - Left, Left, Up, Left, Right, Down

Character Skins

To unlock the following skins, fulfill the corresponding condition in the game:

* G1 Jazz - Complete all sub-missions (both campaigns)
* G1 Megatron - Acquire all Decepticon icons
* G1 Optimus Prime - Acquire all Autobot icons
* G1 Starscream - Finish the Decepticon campaign
* Robovision Optimus Prime - Finish the Autobot campaign

All Missions

To unlock all missions for both the Autobots and Decepticons, insert the following code at the game’s main menu (where the campaign options are listed): Down, Up, Left, Right, Right, Right, Up, Down.