All tracks and Bosses 
Select the "Cheats" option at the main menu. Enter "WACKYGIVEAWAY" 
as a code, then enable that cheat at the "Code Collection screen. 

All cars 
Select the "Cheats" option at the main menu. Enter "WACKYSPOILERS" 
as a code, then enable that cheat at the "Code Collection screen. 

All vehicle abilities 
Select the "Cheats" option at the main menu. Enter "BARGAINBASEMENT" 
as a code, then enable that cheat at the "Code Collection screen. 

Hard as nails mode 
Select the "Cheats" option at the main menu. Enter "CRACKEDNAILS" 
as a code, then enable that cheat at the "Code Collection screen.