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REK playtest
by REK
A robot fighting simulator powered by the same AI as our real world humanoid robots. Become Pro in the Sim and qualify for fighting real robots at live REK events.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Apr 16, 2026
- Planned release
- Coming soon
- Developer
- REK
- Platforms
- Windows, macOS, Linux
- Players
- Cross-platform, Multiplayer, Online PvP, PvP, Single-player
- Languages
- English
How to join the REK playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the REK playtest signup there. You're in straight away, with nothing to pay.
- The playtest shows up in your Steam library, ready to install and play.
New to playtests? How Steam playtests work
How AI is used
AI is used for some of the experiences art, voices, and textures.
The developer's own words, from Steam.
About REK
Update: Rek 2.1 Playoffs. Win and Pilot a real robot.
Week 2 of 2 - Nov 6 8PM PST to Nov 7 8PM PST.
The top 6 players on the leaderboard each week advance to the next stage, for a total of 12 players across 2 weeks.
Play on your preferred platform: PC, Meta Quest, or iOS via TestFlight.
Welcome to REK
THIS IS NOT A GAME, IT'S A SIMULATOR. The simulator is driven by the same neural nets that power our real humanoid robots. Get good at the sim, get good at real humanoid fights. No canned animations. Just physics-based humanoid combat: every punch, block, and stumble governed by real physics and self-balancing AI.
Play the sim. REK the competition. Become a real pilot.
Flatscreen or VR, Steam Deck or PC, keyboard or controller, you embody your machine. Everything from the movement to the keybindings is designed to make you a better pilot in real life. Master your robot's weight, momentum, and balance to dominate.
You start with our modded versions of Unitree G1 and Engine AI T800. As soon as real fights use new models, the Sim will also have them.
There’s a live arena with a queue. The scoreboard counts every clean hit, rounds are on the clock, and ties go to sudden death. There’s always a fight waiting for you. Every hit, every win takes you higher in the championship leaderboard. The best pilots won't just win the game, they'll earn the chance to pilot a real humanoid robot at a live REK Event.
So are you up for the challenge? Are you made for the combat sport of the future? Only one way to find out.
From the game's Steam page.
