The Backrooms is best with company. Here's a free, browser-based Backrooms game with multiplayer built in — wander the halls with others now, and remix it into your own co-op horror game with AI.
The Backrooms is a shared nightmare
Half the fun of the Backrooms is that other people are lost in there too. It's why the biggest Backrooms games — Escape the Backrooms, Inside the Backrooms, Backrooms: Escape Together — are all co-op. And with A24's The Backrooms becoming the studio's biggest film ever (released May 29, 2026), more people than ever want to get lost in the yellow halls together.
Most co-op Backrooms games cost money and need a download. Here's one that's free and runs in your browser.
Play a multiplayer Backrooms game in your browser
We built a first-person Backrooms game on Rosebud AI with multiplayer baked in. When you load it, it asks for a name — "others wander these halls too, what should they call you?" — lets you pick an avatar, and drops you into the liminal space with in-game chat.
👉 Play it here: https://rosebud.ai/play/backrooms-break-in
What that means in practice:
- You're not alone — pick a name and a look, and share the halls with other players
- In-game chat — coordinate, or just narrate the dread together
- The same risk/reward loop — the monsters are your only source of points: keep them in sight for steady points, survive chases for big ones, don't get caught
A note on honesty: the multiplayer here is real but still-maturing groundwork — names, avatars, shared halls, and chat are in. It's a great base to play on and an even better base to build the exact co-op mode you want, rather than a finished, ranked PvP shooter. That's the point of starting from a remixable template.
Make it the co-op game you actually want
Because it's on Rosebud, you can fork this and shape the multiplayer to your vision — and since the foundation is already there, you're extending, not starting over:
- Turn it into team survival — everyone shares a score and has to escape together
- Add roles — one player is the entity, the rest are survivors (asymmetric horror)
- Add proximity voice or text cues, pings, or a shared map
- Reskin the whole thing — Poolrooms, an abandoned mall, your campus — for a private game with friends
You don't write netcode or code of any kind. You tell Rosie, Rosebud's AI assistant, what you want in plain English and she builds it. Full walkthrough: how to make a Backrooms game.
How to play (and remix) with friends
- Open https://rosebud.ai/play/backrooms-break-in
- Enter a name, pick your avatar, and hit enter
- Move with WASD, drag to look, use chat — observe monsters, survive, don't get caught
- To make your own version: click the Rosebud watermark → "Remix this game," then tell Rosie how you want co-op to work
- Publish and share the link — anyone can join in their browser, no download
The pitch
Want a paid, polished co-op Backrooms? Escape the Backrooms and Inside the Backrooms are great. Want one that's free, instant in the browser, and that you can reshape into your own co-op horror game? 👉 https://rosebud.ai/play/backrooms-break-in
Want the solo breakdown first? Here's the free Backrooms game and a list of games like the Backrooms.
Andi Bucescu
Andi is the Head of Marketing at Rosebud, where she writes about the intersection of AI, creativity, and brand storytelling. She explores how generative AI is reshaping marketing strategies and creative workflows, with a focus on making complex technology accessible and cutting through the noise of modern campaigns. Her perspective is informed by undergraduate research on effective social media content and consumer psychology.