Grab a lung full of air and let's dive! Ecco the Dolphin: Defender of the Future has splashed down on the PS2, compliments of Acclaim, Appaloosa Interactive and the good folks at Sega. With lush environments, beautiful creature models and a great mood throughout, it is one of the most breathtaking games on the market today.

It's also pretty darn tough to get through. Luckily, here at IGN, we've taken to eating a lot of plankton, chirping across the cubicles and typing with our bottle noses in preparation for the challenge. What we've come up with is the most complete Ecco guide available. With a full walkthrough for all 27 levels, basic game tips, locations of all Vitalits and more, this will have you tail-walking for joy! Grab a flipper, your blow-hole and a fish side dish and let's get swimming...

Click here to get the guide.

Enter codes at the title screen

Hold L1, L2, R1, and R2, and press X, X, CIRCLE, CIRCLE, X, CIRCLE, UP, DOWN, DOWN: All Vitalits

Hold L1, L2, R1, and R2, and press X, UP, X, DOWN, X, TRIANGLE: Swim With a Group

At the title screen hold R1, L2, L1, R2 and press SQUARE, SQUARE, TRIANGLE, CROSS (X), CIRCLE for infinite air.

At title screen hold R1, L2, L1, R2 and press UP, UP, DOWN, DOWN, TRIANGLE, CROSS, CROSS to unlock all stages.