Full pause screen:
Pause game play, then press X + Y.
Extra tracks in championship mode:
Successfully complete championship mode to unlock the Atlas Sandstorm, Corsica
Rain, Far West Night, Iceland Snow, Scandinavia Storm, and Norway Night tracks.
Extra tracks in outdoor arcade mode:
Successfully complete outdoor arcade mode to unlock the Scandinavia, Jordan,
Greece Sunset, Norway, Iceland, Atlas, Alps, and Canada Rain tracks.
Extra tracks in indoor arcade mode:
Successfully complete indoor arcade mode to unlock the Indoor Scandinavia,
Indoor Far West, Indoor Iceland, Indoor Atlas, and Greece Daylight tracks.
Extra monster trucks:
Successfully complete championship mode to unlock three hidden monster trucks.
Fast start:
Press R + A (using the default controller setting) when "Go" appears during
the countdown at the start of the race. If done correctly, you will get a
four second boost and also start the race faster.
Retry jackpot bonus:
Complete a race in championship mode, then save your game. If you are awarded
the jackpot bonus, but lose, simply reload your saved game to try again.
Sites: