Unlock all boats & tracks:
First, get a top 5 time on any track. Then enter ?DL as a name.
Unlock all boats & tracks (PAL):
First, get a top 5 time on any track. Then enter ?PB as a name.
No timer:
At the main menu, press X + Y + B + Start.
Full pause screen:
Pause the game and press X + Y.
The Genie has more
Hydro Thunder Cheats at CheatingDome.com.
Get the best selection of
Hydro Thunder Cheats, Codes & Walkthrough/Guide/FAQ for Dreamcast from Cheat Code Central