Unlock templar
Win the season mode (come first place in all races and have all objectives completed).
Unlock Items
At the name player screen (cheat screen), enter these codes for their effect. You will hear a sound if entered correctly.
Code - Effect
FREEPLAY - All Racing Levels
WIBBLE - All Tracks
UCANDO - O2 Liveried
Unlock Programming Message
At the name player screen, enter any of these codes to unlock the programming message, which will appear at the end of the credits.
Code - Effect
MUNCHKIN - Programming Message
EDDROOLZ - Programming Message
EDDIEPOO - Programming Message