Open now · By request
Tandemonium playtest
by Users First
Two riders. One bike. Total chaos. Victorian geese, one wobbly tandem, and Grandma's waiting. Pedal, lean, try not to crash. Grab presents, dodge cones and crash spectacularly, alone or with a friend. Steer by tilting your phone, a Steam Controller or a DualSense.
It's free to ask. The developer chooses who gets in.
- Access
- By request
- On playtest since
- Mar 25, 2026
- Planned release
- Coming soon
- Developer
- Users First
- Platforms
- Windows, macOS
- Players
- Co-op, Cross-platform, Multiplayer, Online co-op, PvP, Single-player, Split-screen co-op, Split-screen PvP
- Languages
- English
How to join the Tandemonium playtest
- Open the game's Steam page with the Request access button. Sign in to Steam if it asks.
- Request access to the Tandemonium playtest there. It's free and doesn't commit you to anything.
- The developer lets players in, often in batches, so it can take a while. Steam emails you when you're in, and the playtest appears in your library.
New to playtests? How Steam playtests work
How AI is used
Some game artwork and visual assets were created with the assistance of generative AI tools. All AI-generated content was reviewed and curated by the developer.
The developer's own words, from Steam.
About Tandemonium
Tandemonium — One tandem bike. Two riders. Total pandemonium.
Coordinate pedaling on a shared tandem bicycle where your pedals are 180° apart. Sync up for maximum speed, or clash and wobble into glorious disaster. It's physics-based co-op chaos at its finest.
Key Features:
- Real Tandem Physics — A shared crank means you must coordinate opposite pedal strokes. Perfect sync = turbo power. Same foot at the same time = you're going nowhere fast.
- Online Co-op Multiplayer — Ride together over peer-to-peer with built-in voice and video chat. Watch your partner panic as you tip.
- Captain & Stoker Roles — The Captain and the Stoker steer, balance and power the pedals. Both must work together or crash spectacularly.
- Multiple Input Methods — Keyboard, gamepad joystick or gyro, or have a friend play on mobile and tilt their phone as a motion controller for an immersive lean experience for everyone.
- Two Courses — Sprint to Grandma's House or endure the long road to The Castle, collecting presents and gems along the way.
- 7 Unique Bikes — From Grandma's Classic to the Banana Delivery, each with its own personality. Unlock holiday bikes through achievements.
- Dynamic Difficulty — Safety Mode for beginners, Daredevil for veterans, and adaptive difficulty that meets you where you are.
- 19 Achievements — Earn badges for speed, distance, flawless rides, perfect sync, and more. Your earned badges orbit your rider for all to see.
- Clip Recording — Save and share your best wipeouts and photo finishes with picture-in-picture compositing video/audio.
- Leaderboards — Track your times solo, together, and by role. Who's the better Captain?
Published by Users First (Games) —
From the game's Steam page.
