Tandemonium is a physics-based tandem bicycle party game where one or two players must coordinate pedaling and balance to race through obstacle-filled courses.

In multiplayer, the Captain (front rider) controls steering and balance while the Stoker (back rider) provides pedaling power. Like a real tandem bicycle, the pedals are offset 180 degrees — perfect synchronization delivers maximum speed, while miscoordination leads to hilarious wobbles and crashes.

Built entirely for the web using Three.js for 3D rendering and WebRTC for peer-to-peer multiplayer, Tandemonium runs in any modern browser with no download required. Players can tilt their phone, use keyboard controls, or connect a gamepad.