DethKarz

Firstly, press and hold Shift + Ctrl + C on
the main screen to open the CHEATS option.
On the Cheats Screen, type one of the following:
GLOBAL     - All tracks are selectable
DEV 6     - All cars are selectable
RACE CORPS - All seasons are selectable in
          Championship Mode
Other Version
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Enter one of the following codes at the
main menu to activate the corresponding
cheat function:
All Cars     - itsasmallworld
All Tracks   - kcolnu
All open     - zrakhted