Hidden Roof is a free multiplayer graffiti game in your browser — paint ink-drawn rooftops alone or with your friends.

Yes, with no ads or purchases. If you like it, you can buy me a coffee on Ko-fi.

No. Open roof.hidden.haus and play: no install or sign-up.

Not yet. The game needs a keyboard, a mouse, and a window at least 820×560, so please open roof.hidden.haus on a computer.

No, you can only play with a keyboard and a mouse.

There’s just one level: a large rooftop, the same in solo and multiplayer. It gets new walls, windows, signs, and props with each update.

Every key can be rebound in Settings → Controls.

Yes. You’ll hear real recordings of the city at night from a rooftop, of rain and of thunder, along with your footsteps, the whirr of air conditioners, and the hiss of your spray can. Step into a room and the city gets muffled, while the rain changes to rain on a tin roof. Adjust the volume in Settings → Audio.

Yes. The hiss gets louder with more opacity, closer to the wall, and with your hand moving, and every cap has its own loudness and tone.

Like a brush in a drawing app that behaves like a real can. Each stroke lays a continuous line of paint under your aim, with no gaps at any hand speed, and passes add up. The line depends on your cap, distance, hand speed, angle, and opacity.

Your cap, your distance from the wall, and your hand speed. Up close the line is narrow and crisp, and it gets wider and softer as you step back. Slow strokes are dense and sharp, fast ones lighter, wider, and softer. Spray at an angle and the paint stretches along your aim, fading towards the far end.

Six: NEEDLE for sharp details and highlights, SKINNY for clean tags and crisp outlines, BANANA for everyday painting, BLUE DOT for smooth blends and fades, NY FAT for throw-ups and quick fills, and ASTRO FAT for big fills and backgrounds. You start with BANANA and find the rest around the roof. Q and E switch between them by default.

Hold Run (Shift by default) and scroll with the can in hand. It goes from 5% to 100%, and each pass builds on the last, so you can work up a fade.

Too much wet paint in one place. Hold your aim in one spot or go over fresh paint and it builds up, darkens, then starts to run slowly down the surface. Paint dries in seconds, so what counts is how much you lay in a short time. Heavier coverage runs longer, every cap runs differently, and the marker and the roller can trigger runs too.

The line you’re about to leave. It’s as wide as the line would land, adjusting to your cap, distance, hand speed, and opacity, an arc shows the opacity you set, and it fades where the paint won’t reach. The marker, the roller, and the sponge show their real size too.

Turn up Streamline in Settings → General: the brush trails your aim a little, which takes the jitter out of your lines. The same tab has a lower mouse sensitivity and a narrower field of view just for painting.

A marker for crisp lines and letters and a roller for large areas, and a sponge scrapes paint off. You find them around the roof, and Q and E change their width by default.

No. The can never loses pressure or sputters, so shaking is just for vibes.

No, paint never runs out.

It’s a game, but the spray can follows real rules. Distance, hand speed, and the cap you use all affect the line, and the paint drips. It works for practicing letters, fills, and outlines.

No. Start with a tag or a fat outline and use the sponge to scrape off anything you don’t like.

Yes, you can download your roof’s paint as a file and upload it back later for a new session. Public sessions keep their paint on the server, but private sessions lose their paint once the last player leaves.

Yes. Public sessions are open to everyone, up to 40 players at a time. The paint is kept on the server, so the walls fill up over days.

It’s a shared rooftop, not a private gallery. Your work can be painted over or scraped off, just like real graffiti. We ask everyone to respect each other’s pieces, and the admin may ban repeat offenders.

A desktop or laptop computer, a browser with WebGL2, a keyboard and a mouse, and a window at least 820×560. Settings → Graphics lowers the load for weaker graphics cards, and its performance test measures your frame rate.

Run the performance test in Settings → Graphics. It flies over the roof for a few seconds, shows whether the processor or the video card holds the game back, and says what to change. Most often that’s Volumetrics first, then Resolution or City detail. If the processor is the limit, closing other browser tabs helps too.

Most often it’s a power saver. On battery, Chrome’s Energy Saver, Edge’s efficiency mode, or a Mac’s Low Power Mode hold the game at about 30 FPS, even when the computer has power to spare. Plug in, or turn the power saver off: in Chrome at chrome://settings/performance, in Edge at edge://settings/system, on a Mac in System Settings → Battery. The performance test tells you when something is holding the frame rate back like this.

The browser may be drawing the game on the graphics chip built into the processor while the faster card sits idle. Settings → Graphics → GPU shows which one the game uses. On Windows, go to Settings → System → Display → Graphics, pick your browser, choose High performance, and restart the browser. On a Mac, turn off Automatic graphics switching in System Settings → Battery → Options.

Check Frame rate in Settings → Graphics: a number there holds the game at it, and Max runs it as fast as your display refreshes. If it’s on Max and the game still sits at about 30 FPS, it’s likely a power saver (see above).

Hidden Roof was first released on 9 October 2026.

Bombing!!: A Graffiti Sandbox and Bombing!! 2, Marc Eckō’s Getting Up: Contents Under Pressure, and Daisuke Tajima’s pen-and-ink cities in Beyond the Lines.

One developer, GeoGeorgeous, under the Hidden Haus name, using three.js. The source code is on GitHub under the Hidden Roof Source-Available License.