Gamefaqs.com had updated it's Transformers codes section with a selection of new cheat codes for your playing pleasure. Here's the codes:
Enter the following codes at Autobot HQ
Big Head Mode
Circle, Circle, Circle, Square, L1, L1, L1, L2
Infinite Powerlink

Transformers: Earth Wars Cheats/Exploitation? Discussion in ' Transformers Video Game Discussion ' started by Lemonstorm, Aug 7, 2017. Lemonstorm, Aug 7, 2017.

Up, Down, Up, Down, Circle, Square, Square, Circle
Infinite stealth - NB: You must have the convert minicon equipped
Up, Up, Down, Down, L1, L2, L1, L2
L1 Turbo Mode
L1, R2, R2, Square, Square, Square, Square,
To enter the following code, you must first pause the game whilst in a level. You will have to re-enter this code every time you enter a level.
Kill all enemies with a single shot
Square, Circle, Square, Circle, L1, L1, L2, L1 Kill any enemy with one shot.

Cheat Codes Video Games

Credit(s): gamefaqs.com