Unlockable vehicles 
     Complete  the  appropriate  tasks  in  the  correct game mode and
difficulty to unlock extra vehicles.

Unlockable:    How to Unlock:
HIGHROLLER     Beat the Burbs on the captain difficulty without letting 
               the opponent score in a single level 5 minute game. 
               
BLUE BOMBER    Win at the trainyards on the captain difficulty 
               only using the helicopter to score in a single level 
               5 minute game. 
               
SWEET CHEEKS   In a single level 2 minute game on captain, 
               win any level without letting the opponent score.

DUMPER         On the sergeant difficulty, beat tournament mode.

SHAMROCK       In a single level 5 minute game on the sergeant 
               difficulty, beat any level without letting 
               the opponent score. 

CHERRY PICKER  In a single level 5 minute game on the chief difficulty, 
               win at the burbs with at least 20 points. 
               
FLEABAG        On the chief difficulty, beat tournament mode. 

LITTER BOX     On the captain difficulty, beat tournament mode. 

YELLOWJACKET   In a single level 5 minute game on the captain 
               difficulty, win only using the 3 point ramp 
               in the Alpine. 

YELLOW ROSE    On the rookie difficulty, beat tournament mode.