Level Select
At the title screen, hold L1 + L2 + R1 + R2 and press Up, Up, Down, Down, Triangle, X, X.

Infinite Health
At the title screen, hold L1 + L2 + R1 + R2 and press Triangle, X, X, Up, Up, Down.

Infinite Air
At the title screen, hold L1 + L2 + R1 + R2 and press Square, Square, Triangle, X, O.

Unlock All Levels
At the title screen, hold L1 + L2 + R1 + R2 and press X, X, O, O, X, O, Up, Down, Down.

Swim in a Group
At the title screen, hold L1 + L2 + R1 + R2 and press X, Up, X, Down, X, Triangle.

Dolphin 'Soccer' Mini-Game
In the Powers Of Levitation level, go to the room where the clan General is located. Swim through the side of the wall that moves like jelly. Then, on the floor near one of the orange lights is a football. Get it and go to the level selection screen. An extra option for the Dolphin Soccer mini-game will now be available.

Go to: Ecco The Dolphin: Defender of the Future Info Page | nGaming Home Page.