Welcome to the cheats for Choro Q Marine Q Boat for the PlayStation. Below are the cheats.
Select same boat
At the track selection screen, select "Free Run" mode, then press Up(2), Down, Up, X.
Extra mode
Complete all the missions, finish in first place on all tracks, and collect all stone signs from the tracks. Then, the "????" selection on the options screen will turn into "Extra mode". Use this option to access a "Death Fight" feature and the bonus Marinoid Bay track.
