Monster Jam: Maximum Destruction is a video game of the vehicular combat genre released in 2002 by Unique Development Studios. The game is based on the USHRA Monster Jam series, and features several real-life trucks, including the Grave Digger. Although it contains racing-based minigames, the primary focus is on the combat, which includes power-ups and weapons in addition to demolition derby style maneuvers. The game was published by Ubisoft and it is available for PC, Game Boy Advance, GameCube and PlayStation 2.
(Wikipedia)

CHEATS

Start the game with the mtruck.exe (command line parameter) command line to activate the corresponding cheat function.

Command line parameters

Disable opponent truck - AI NOAI

Skip user interface - SKIPUI

Truck select - TRUCK

World select - WORLD

Windowed mode - WINDOWED

UNLOCKABLES

1983 Grave Digger - Win season one in any mode under the normal difficulty setting.

20th Anniversary Grave Digger - Win season two in cash grab mode under the hard difficulty setting with a championship truck.

Armored Force - Complete season three in cash grab mode under the easy difficulty setting with a championship truck.

Big Yellow - Complete season two in cash grab mode under the extreme difficulty setting with a championship truck.

Bull Dog - Complete season two in cash grab mode under the easy difficulty setting with a championship truck.

Championship truck - Win a season under any difficulty setting to unlock the championship version of the truck that was used.

Dog Pound - Complete season one in any mode under the easy difficulty setting with a championship truck.

Hooch - Complete season three in any mode under the extreme difficulty setting with a championship truck.

IP/Inland truck - Complete season one in any mode under the extreme difficulty setting with a championship truck.

The Incredible Hulk - Win season three in cash grab mode under the hard difficulty setting with a championship truck.

GAMEPLAY HINTS

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.


Here is this game's intro movie: