Cheat codes:

All cars:
     Start a new season and enter "MOOBMOOB" as a name.

All tracks and cars:
     Start  a new season and enter "PREALL" as a name. Note: This will
not unlock the Vapor or Radia cars.

Pro level tracks and cars:
     Start a new season and enter "PREPRO" as a name.

Veteran level tracks and cars:
     Start a new season and enter "PREVET" as a name.

Rally Cross Oasis track:
     Start a new season and enter "SISAO" as a name.

Rally Cross Jungle track:
     Start a new season and enter "ELGNUJ" as a name.

Little Woods track:
     Start a new season and enter "FOSTER" as a name.

Frozen Trail track:
     Start a new season and enter "NIVEK" as a name.

Dusty Road track:
     Start a new season and enter "MIT" as a name.

Rock Creek track:
     Start a new season and enter "KCIN" as a name.

Dry Humps track:
     Start a new season and enter "CIRE" as a name.

Hillside track:
     Start a new season and enter "BSIRHC" as a name.

Low gravity:
     Start a new season and enter "AIRFILLED" as a name.

Original Rally Cross game physics:
     Start a new season and enter "LEADSHOT" as a name.

Restore Rally Cross 2 game physics:
     Start a new season and enter "MOONEY" as a name.

Disable collision detection:
     Start a new season and enter "INCORPOREAL" as a name.

Unknown:
     Start a new season and enter "NOGREEK" as a name.

Super speed racing / no limit to turbo:
     Press  triangle  twice  when the race start and press Up when you
move to get full charged speed.