Mountain biking fans can get a taste of the great outdoors as they freeride down four expansive slopes in Mountain Bike Adrenaline. Pedal pushers can navigate vast 3D reproductions of the Rocky Mountains, the Alps, the Grand Canyon, and Hawaii. Holding down the accelerate button will eventually tire out racers, so players need to be judicious or they'll get bonked early and won't have enough juice to pull off any sick stunts when they sky over extreme jumps. Players can choose from six riders, including American phenom Keith Hamilton, and a host of different bikes. There are four game modes from which to choose: Stopwatch mode, which focuses on speed; Challenge mode, which concentrates on specific feats; Arcade mode, which is all about pulling off tricks, and Freedom mode, which lets players ride each landscape unconstrained by time limits.