luma.Download

Your games.
Faster.
Nothing in the way.

Luma is a free, open source operating system with a Windows compatibility layer built in. Your Steam library runs. Discord, OBS, and Spotify run next to it. And when you press play, the rest of the system goes quiet.

Frames per secondGame Mode on
144fps
Frame time6.9 ms
1% low131
Background loadQuiet

Illustrative. Real numbers depend on your hardware and the game.

0accounts to create
0ads, subscriptions, or upsells
1update list for the whole system
$0now, and always

Your operating system should be the least interesting thing about your evening.

Here’s how Luma goes about that, in three moves.

Your library.

Every launcher and every game you already own. Same icons, same saves, same search.

The Windows compatibility layer is part of Luma, not something you bolt on. Steam, Epic, GOG, itch.io, and Battle.net install like any other app, and every game in them gets its own icon in the dock, its own file associations, and its own entry in search. Type three letters and it is there, in the same list as your folders.

No launcher wrapping a launcher. No launcher fighting the system. You sit down and the game you were playing last night is one click away.

Launchers

SteamWindows layer
Epic GamesWindows layer
GOG GalaxyWindows layer
itch.ioWindows layer
Battle.netWindows layer

Icons that match

A Windows app on Luma gets its real icon in the dock and the app grid, not a generic placeholder.

Files that open

Save files, mods, and configs open in the app that made them. Double-click works the way you expect.

Drivers and controllers, in the box

Graphics drivers ship with the system and update with it. Controllers pair and work across the desktop and in the game.

Your tools.

Everything around the game for a late-night session. All there, none of it fighting the game.

Discord for the party. OBS for the stream. Spotify for the lobby. A browser for the wiki. VLC for the clip you just recorded. They install, update, and uninstall like everything else, under one permission model, so nothing gets special treatment and nothing gets left behind.

One update list covers the system, the drivers, and every app in it, on a schedule you set. Remove an app and its files and settings go with it.

Windows layer
SteamYour library, your cloud saves, your friends list.
Windows layer
Epic GamesThe other library, with the same treatment.
Windows layer
DiscordVoice and text for the party, in the dock like anything else.
Windows layer
OBS StudioCapture, scenes, and the stream.
Android layer
SpotifyThe Android app, next to the rest.
Native
ChromeFor the wiki tab, the build guide, and the patch notes.
Native
FirefoxSame job, different browser. Your call.
Native
VLCPlays the clip you just recorded, and everything else.
Removed
Removed OBS StudioJust now
App412 MB
Settings and profiles2 MB
Cache and logs1.1 GB
Left behind0 B

Removing an app removes its files and its settings. Illustrative.

Game Mode

Press play. Everything else goes quiet.

Flip it and Luma holds notifications, pauses updates and Luma Sync, and keeps background apps from asking for attention. Flip it back and everything picks up where it left off.

Ari can flip it for you when a game launches, if you want. Or you remove Ari entirely and it never bothers you.

Game ModeOff. Try the switch.
NotificationsDelivered
UpdatesOn your schedule
Luma SyncRunning
Background appsNormal
AriAvailable

Illustrative. The real switch lives in Quick Settings.

On the go.

Luma in your pocket and on the tablet runs what you expect, and the desk keeps up with you.

Android games run through the built-in Android layer, the same one that runs Spotify on the desk. Clash of Clans on the phone, Genshin Impact on the tablet, with the same permission model and the same update list as everything else.

Your Steam library stays on the desk; nobody is promising you Elden Ring on a phone. What travels is everything around it. Luma Sync keeps the desk and the phone in step, so the Discord thread you were reading on the big screen is open on the small one, and the notifications that waited are waiting in the same place.

A tablet running Luma on a café table.
The tablet
  • Genshin Impact
  • PUBG Mobile
  • Roblox
  • Minecraft
  • Hearthstone
A phone running Luma, held outdoors in a plaza.
The phone
  • Clash of Clans
  • Brawl Stars
  • Clash Royale
  • Among Us
  • Call of Duty Mobile

Luma Sync

Start on the desk, continue on the phone. Same apps, same state, nothing to set up.

The Android layer

Android games and apps run through it on the phone, the tablet, and the desk. Your PC games stay where the GPU is.

One system

Desktop, tablet, and phone run the same Luma, with one permission model and one update list between them.

Try it first

Boot it from a stick. Decide later.

Write Luma to a USB stick, boot from it, and use the whole system for an evening: open Steam, launch something, check your frame rate. Nothing on your disk changes while you try it. Install when you are sure, or pull the stick out and carry on.

Free and open sourceNo accountDesktop, tablet, and phoneBuilt by a small team and thousands of contributorsFunded by donations