Bebe
To unlock Bebe lose the Cowdays race without touching the antidote.
Big Gay Al
To unlock Big Gay Al win the Pink Lemonade race.
Cheat mode
Successfully complete championship mode without using any tokens to unlock all tracks, cars, skins, and other cheat options.
Death
To unlock Death win the Halloween race but only drop off the candies in groups of four.
Game music
Play track two and higher of the game disc in an audio CD player to hear sound samples and music from the game.
Grandpa
To unlock Grandpa win the Halloween race.
Ike
To unlock Ike collect the pot pie on the wing of the crashed aeroplane in the Memorial Day race.
To do this, first get a Phillip Phart from the green boxes and drive up the right hand side and collect the Terrance Turbo while the earthquake is going (breaks between earthquakes are about 20 seconds) to land on the aeroplane wing and collect the pot pie. This may take a few tries.
Jesus
To unlock Jesus win the Christmas race.
Mephesto
To unlock Mephesto win the 4th of July Independance Day race.
Mr Garrison
To unlock Mr Garrison cross all four checkpoints with the trophy on the Rally Days 2 race.
Mr Mackey
To unlock Mr Mackey win the Spring Cleaning race.
Ms Cartman
To unlock Ms Cartman win the Pink Lemonade race without letting any of the other racers get to a checkpoint. (This is very difficult.)
Ned
To unlock Ned collect over twelve turbo pick-ups in the 4th of July Independance Day race.
Pip
To unlock Pip only cross checkpoints 1 and 4 with the trophy on Rally Days 2.
Scuzzlebutt
To unlock Scuzzlebutt collect the pot pie next to the waterfall in the Easter race.
To do this, first collect a Phillip Phart, then drive at an angle at the ledge with the pot pie on, then activate the Phillip Phart to land on the ledge and collect the pot pie.
Starvin Marvin
To unlock Starvin Marvin lose the Thanksgiving race by not collecting any turkeys.
Terrance and Phillip
To unlock Terrance and Phillip collect the four pot pies in the Christmas race. There is one behind the building on the right when you start off near checkpoint 1, the second is above the water bridge near checkpoint 2, the third is behind the building coming up to checkpoint 3, and the fourth is behind the building near checkpoint 4.
Tweak
To unlock Tweak collect five caffiene pick-ups in the blue boxes on the Spring Cleaning race. (The caffiene pick-ups make blue tyre marks under your wheels.)
Visitor
To unlock Visitor collect the two Golden Cows in the Memorial Day race. One is on the ledge around checkpoint 1 and the other is on the side of the bridge near checkpoint 4.