At the main menu, choose the "Options" selection, then hold R and quickly press Up(2), Down(2), Left, Right, Left, Right, X, B, X, B at the options menu. If you entered the code correctly, the "Cheat Name" screen will appear. Enter one of the following case-sensitive codes, then exit back to the options screen to activate the corresponding cheat function:
Successfully complete the game on the hard difficulty setting to unlock Steve as a playable character and the Bermuda Triangle level.
Collect 100 balloons in countdown mode.
No Gameshark Splashdown Hacks found.