Monster Jam Maximum Destruction 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. Hint: Jumping: Hold Up, release, then press Down. Hint: Wheelie: Hold Down, then press X.