1983 Grave Digger
Win season one in cash grab mode under the normal difficulty
setting.
20th Anniversary Grave Digger
Win season two in cash grab mode under the normal difficulty
setting.
The Incredible Hulk
Win season three in cash grab mode under the normal difficulty
setting.
Championship truck
Win a season under any difficulty setting to unlock the
championship version of the truck that was used.
IP/Inland truck
Complete season one in any mode under the hard difficulty setting
with a championship truck.
Big Yellow
Complete season two in any mode under the hard difficulty setting
with a championship truck.
Hooch
Complete season three in any mode under the hard difficulty
setting with a championship truck.
Dog Pound
Complete season one in any mode under the extreme difficulty
setting with a championship truck.
Jumping
Hold Up, release, then press Down.