Hydro Thunder

Hard category:
Press Low View + Pilot View + High View at the boat selection screen.

Disable catching up:
Hold Low View + High View and hold the Throttle in "Reverse" before choosing a boat at the selection screen. A sound will confirm correct code entry. Catching up by other boats while you are in the lead will be disabled.

No opponents:
Hold Low View + Pilot View and hold the Throttle in "Reverse" before choosing a boat at the selection screen.

Hydro Speedway track:
Highlight "Lake Powell" at the track selection screen, then quickly press Pilot View three times.

Nile Adventure track:
Enable the "Hydro Speedway track" code. Earn a free game during game play on the Hydro Speedway track. The Nile Adventure track will be unlocked during the free game.

Armed Response boat:
Highlight the Thresher at the boat selection screen and quickly press Pilot View three times.

Tinytanic boat:
Highlight the Tidal Blade at the boat selection screen and quickly press Pilot View three times.

Blowfish boat:
Highlight the Hazard at the boat selection screen and quickly press Pilot View three times.

Chumdinger boat:
Highlight the Razorback at the boat selection screen and quickly press Pilot View three times.

Quick start:
Set the Throttle to "Stop" before the pre-race countdown. Push the Throttle to "Full" as "3" disappears. Push the Throttle to "Stop" as "2" disappears". Push the Throttle to "Full" as "1" disappears. If done correctly, you will have a quick start with four extra seconds of fuel.