Supercross Circuit is a motorcycle racing game with both supercross and motocross tracks. In addition to the handful of fictional "local" tracks there are 9 tracks that are modeled after actual national event courses. Included in the game are 15 professional riders, and licensed gear and bikes to choose for your rider.
When you start a race you are given the opportunity to set up the suspension, exhaust, and brakes. Racing modes include Free Ride, Time Trial, and Season. The majority of the tracks must be opened in Season mode before they can be ridden in Free Ride.
The game's physics engine allows for precise control over the bike, with application of the brake helping to make tight turns, and the use of the goose button, along with weight shift, able to maximize or minimize air on any given jump. In single player mode, there are 7 AI riders on the track, and in 2 player split screen racing, there are 2 AI players.
The game also features a dozen tricks that can be performed in the air with various combinations of the shoulder buttons, with points awarded for using these tricks. As you progress through Season mode, you'll need to buy new tires, add parts to your bike for increased performance, and upgrade from smaller to larger engines.