The game received mainly positive reviews. IGN gave the game a 9.3/10, praising the overall presentation and gameplay, but criticized the environments' potential aging.GameSpot gave the game a score of 7.7, criticizing the aerial races, but praising the controls, physics, tracks, amount of game modes, and the track editor. PlayStation Illustrated gave the game a more critical review, with a score of 66%, calling the game "boring".
MX vs. ATV Unleashed includes 9 motorcycles and 14 ATVs. The motorcycles range in size from 50cc pit bikes up to 500cc race-ready cycles. The ATVs are primarily 450cc and can be two or four-stroke.
MX vs. ATV also features vehicles that are not normally in an off-road racing game, including off-road buggies, monster trucks, trophy trucks, sand rails, and golf carts. Aircraft are also featured, bringing airplanes and helicopters to the title.