Maximus Dev Tech
Free browser horror game
Maxrooms
Maxrooms is a free 3D backrooms game in your browser, made by Maximus Dev Tech. You slip out of the back of every MDT game into the empty, humming places behind them: endless liminal rooms under buzzing fluorescent lights that go on forever.
About Maxrooms
There are nine levels, each one an MDT game's place gone wrong: the Yellow Office, the Grand Hall Below (Maximus World), the Casino After Hours, Aisle Infinity (Florbmart), the Lower Decks (MDT Titanic), the Closed Wing (the Maxeum), Car Park -14 (MDT Racing), the Dead Station (Space Explorer) and the Changing Rooms (Legends Legacy FC). Every level is different every time a new world opens, and something lives in each of them.
How to play
- Walk with WASD (the stick on a phone) and look with the mouse (drag on a phone). Shift runs, but it tires you out. C crouches.
- Explore. There's no end and no win: find the Easter eggs left behind from every MDT game, and the free-standing doorways with a green EXIT sign that take you to another level.
- The creatures see you in the light and hear you run. If one sees you, break its line of sight round a corner and keep going.
- Look for the low gaps under the walls and crouch through them (you duck by yourself when you walk into one). Most creatures are too big to follow you.
- F switches on your torch (it helps you see, and helps them see you). G drops a glowstick to mark your way. Q shouts "Over here!" to everyone nearby.
- Signed in, you share one world with everyone else inside, and arrive within 100 metres of the others. When the last person leaves, that world is gone and the next one is brand new.
What's in it
- Nine endless levels behind MDT games, from a yellow office to a flooded ship and a supermarket that never ends
- Eleven creatures, from the Hollow and the Crawler to the Usher (it moves only when nobody is looking), the Dealer, the Shopper, Headlights and the Static
- Over 35 Easter eggs from MDT games: a Coin Rush cabinet, TB-9, an eternal flame, MD-2, a Darts: Track & Play dartboard, a bowl of hummus and more
- Branded signs, posters and broken things everywhere: Florbmart aisles, MDT Casino tables, Maxeum plinths and MDT Racing karts
- A Field Log of every level, Easter egg and creature you've found, and your stats
- One shared world for everyone signed in, a new world whenever the last person leaves
- Sound that tells you where things are, subtitles for every sound and lots of settings: creatures off to just explore, gentle or no flickering lights, film grain, VHS look, draw distance and more
- Earn MXC for every new Easter egg, every new level and every kilometre you walk
Questions
Is Maxrooms free?
Yes. Maxrooms is completely free, with nothing to buy.
Do I need to download anything?
No. Maxrooms runs in your web browser, so there is nothing to install.
Does it work on my phone?
Yes. Maxrooms works on phones, tablets and computers. On an iPhone you can also add it to your home screen from Safari's share menu.
Do I need an account?
You can play straight away as a guest in a world of your own, but nothing is saved. Sign in with a free Maximus Dev Tech account to share the one world with everyone else, keep your Field Log and collect MXC.
Is there a free backrooms game I can play in my browser?
Yes. Maxrooms is a free backrooms game that runs in your web browser on a computer, tablet or phone, with nothing to download.
Is Maxrooms the same game as MDT Backrooms?
Yes. MDT Backrooms was renamed Maxrooms in November 2026. It is the same game at the same address, and your Field Log and stats carry on.
Can I play the backrooms with friends?
Yes. Everyone signed in shares one world, and new players arrive within 100 metres of the others, so you can explore and run from things together.
Is it scary?
It can be. If you'd rather just explore, switch the creatures off in Settings, turn jump scares off, or make the lights flicker gently.
