Monster Jam: Maximum Destruction (PlayStation 2)
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1983 Grave Digger
Win season one in cash grab mode on the normal difficulty setting to unlock the 1983 Grave Digger.
20th Anniversary Grave Digger
Win season two in cash grab mode on the normal difficulty setting to unlock the 20th Anniversary Grave Digger.
All Trucks
To unlock all trucks in Monster Jam: Maximum Destruction press R1, R1, R2, R2, L1, L1, L2, L2, START.
Big Yellow
Successfully complete season two in any mode on the hard difficulty setting with a championship truck to unlcok the Big Yellow.
Bull Dog
Complete season 2 of cash grab with a champ truck to get the ''Bull Dog'' truck.
Championship truck
Win a season on any difficulty setting to unlock the championship version of the truck that was used.
Dog Pound
Successfully complete season one in any mode on the extreme difficulty setting with a championship truck to unlcok the Dog Pound.
Freeze opponents
Press Up, Down continuously until the man says "It's Monster Jam". Sometimes your opponents will freeze.
Hooch
Successfully complete season three in any mode on the hard difficulty setting with a championship truck to unlcok the Hooch.
IP/Inland truck
Successfully complete season one in any mode on the hard difficulty setting with a championship truck to unlock the IP/Inland truck.
Jumping
Hold Up, release, then press Down.
Regain health
In some levels, when you drive around and break items your health meter will slowly increase.
The Incredible Hulk
Win season three in cash grab mode on the normal difficulty setting to unlock The Incredible Hulk.
Wheelie
Hold Down, then press X.