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Deep Amazon Level Completed

Press Left, Right, Left(2), Right, R1, R2, Circle at the difficulty selection screen.

Mid Atlantic Level Completed

Press Circle, Square, Circle, Square, Right, Left(2), Right at the difficulty selection screen.

Alaska Level Completed

Press R1, Circle, R1, Square, Left(2), Right, Left at the difficulty selection screen.

Starship Level Completed

Press Left(2), Right, Circle(2), Right(2), Left at the difficulty selection screen.

Earth Level Completed

Press R2, R1, L1, L2, Square, Circle, Square, Circle at the difficulty selection screen.

Turbo Mode

Press L1, R2, R2, Square, Square, Square, Square, L1 at the difficulty selection screen.

Big Head Mode

Press Circle, Circle, Circle, Square, L1, L1, L1, L2 at the difficulty selection screen.

Extra Cinema

Collect all of the mini-cons to unlock an extra cinema.

One Hit Kills

While playing, pause the game and press SQUARE, CIRCLE, SQUARE, CIRCLE, L1, L1, L2, L1. You will hear "Code Accepted" when entered correctly.

All Mini-Cons

While playing, pause the game and enter R2, R1, LEFT, RIGHT, LEFT, RIGHT, CIRCLE, SQUARE.

Fight Unicron

First you need to beat the Pacific islands level, then you need to have gotten a total of 30 minicons. When you do these two things you can go to the Cybertron level where you fight Unicron in his planet mode.