Here are some cheats and tips for the game Wipeout.
Velocitar track:
Successfully complete race mode with a Bronze or better finish.
Cyclone weapons power-up:
Successfully complete the weapons challenge mode with a Bronze or
better finish. This power-up doubles the damage caused by your
weapons.
Piranha II ship:
Successfully complete time challenge mode with a Bronze or better
finish.
Super-combo challenge mode:
Successfully complete all three challenge modes.