This game is also available on PS2.
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Road Sweeps - All tracks
Loaded - All cars
Feather - Low gravity
Poke - Slow-mo mode
Downforce - CART car
Walk It - Slower CPU cars
No Dogs - No HUD
Feather - Zero gravity mode
No Dogs - Disable the heads up display
loaded - Get all available cars
Downforce - Unlock the CART vehicle
Poke - Slow down time
Road Sweeps - Get all available tracks