Wipeout Fusion

Select 'Extras' at the main menu, then select 'Cheats'. After that, enter Triangle, Circle, Circle, Triangle, X as a code.

To get a faster start than the rest of the racers, don't hit the gas until immediately after the announcer says go. If you hit it too early, you'll get the normal, slow start.

Select 'Extras' at the main menu, then select 'Cheats'. After that, enter Square, X, X, X, Triangle as a code.

To unlock mini ships, go to the Extras screen, then go to Cheats. At this screen, move the rows of symbols to form this line: Circle, Square, Square, X, Circle.

To unlock new teams, complete the corresponding objectives:

Auricom Team: Complete Franco Gonzalez Challenge with a Gold Medal.
EG-r Team: Complete Alex Reece Challenge with a Gold Medal.
Tigron Team: Complete Sveta Kirovski Challenge with a Gold Medal.
Xios Team: Complete Zala Woolf Challenge with a Gold Medal.
Pirahna Team: Complete Jann Shlaudecker Challenge with a Gold Medal.