Unlock the following cars by beating the corresponding races:

Colin McRae R4 - Beat the X-Games Europe
Dallenbach Special - Beat the Trailblazer World Tour
Ford Escort MKII - Beat all X-Games events
Ford RS200 Evolution - Beat the Rally Cross World Tour
MG Metro 6R4 - Beat all of the X-Games events
Mitsubishi Lancer Evolution X - Beat the X- Games Asia
Mitsubishi Pajero Dakar 1993 - Beat the Raid World Tour
Subaru Impreza WRX STi - Beat the X-Games America
1995 Subaru Impreza WRX STi - Beat the Colin McRae Challenge
Toyota Stadium Truck - Beat the Landrush World Tou