American Chopper is based on the TV show of the same name, seen on the Discovery Channel, where players can customize and race motorcycles.
The game offers various challenges, including regular races and free-roaming city driving with plenty of traffic to navigate. As part of this game, you play as the "new guy" on the show; the Teutuls (voiced by the actual people from the show) send you on missions, each featuring several goals – some mandatory, while others are optional.
The gameplay revolves around completing these objectives, which unlocks new motorcycles and parts for customization. As you progress through the game, the challenges become increasingly difficult, requiring players to use their skills and knowledge of motorcycle racing to succeed.