Questions
Short answers. If yours is not here, ask on the Discord.
The basics
What is Atrium?
An operating system for a gaming PC, made by 24HG, the Social Gaming Platform. The computer starts in 24HG, with your games, our servers, your friends and Vox on screen, and a normal desktop one click away.
Can I download it?
Yes. Atrium is an early release and it is free. The download page has the two installers, what you need, and how to install it.
Is it finished?
No. So far it runs on virtual test machines and on one real laptop with Intel graphics. The installers offered here have been used only on virtual machines. The download page lists what is not finished, and the roadmap shows what is left.
What does it cost?
Nothing. Atrium is free to download and use. Paid 24HG services are optional.
Was this called HubOS?
Yes, until October 2026. That name came from a web address we have retired. An atrium is the hall that every room opens onto. It is also a chamber of the heart, and our logo has a heartbeat line in it.
What is it built on?
On Bazzite, a Fedora-based system made for gaming, with the KDE Plasma desktop. We add the 24HG layer on top.
Installing
What do I need?
A 64-bit PC with an Intel or AMD processor, a USB stick of 16 GB or more (2 GB or more for the small installer), and an internet connection after installing; the small installer needs it while installing too. Our test machines run Atrium with 6 GB of memory and a 40 GB disk; a PC for games needs more of both. We have not measured a minimum yet.
Which installer do I need?
If you are not sure, take the large one: once it is on the stick it installs without an internet connection. Both look at the graphics card and choose: one system for most PCs, one for older NVIDIA cards, one for newer ones. The large one, about 14 GB, holds the systems on the stick. The small one, about 1.2 GB, downloads the system while it installs and needs the connection the whole time.
Does installing erase my disk?
Yes, the whole disk you install Atrium on, and it cannot be undone. Copy everything you want to keep off it first. If the PC has more than one disk, tick only the one for Atrium. Keeping another system on the same disk is not something we have tested. Atrium can also be installed onto a USB drive in place of the PC's own disk. On one virtual test machine a Windows-style disk beside it was unchanged afterwards; the download page says how, and what to know first.
What is the blue screen after installing?
It is Secure Boot, a safety feature of the PC, asking whether it may trust the system. It appears once. Do not press Enter straight away: go down to "Enroll MOK", then "Continue", "Yes", type universalblue, then "Reboot". The download page has a picture of it.
Does it work with NVIDIA graphics cards?
The installer chooses a system with NVIDIA's driver for cards that NVIDIA's drivers still support, about the GTX 900 series and newer. An older NVIDIA card gets the standard system. Our test machines have no NVIDIA card, so we have seen neither that choice nor those systems on a real card yet.
How do I remove it again?
Atrium has no uninstaller. To remove it, install another system on that disk. The Secure Boot key you confirmed stays stored in the PC after that. A start entry called "Bazzite" stays in the PC too. If Atrium is on a USB drive, pulling the drive out removes it from the PC.
Using it
Is it a normal computer too?
Yes. The Desktop button shows a regular desktop with a browser and an app store, and Home brings 24HG back. Nothing closes when you switch.
Will my games run?
Atrium runs games through Steam and Proton, as the system it is built on does. On that system many Steam games run. On a laptop with Intel graphics we have started Counter-Strike 1.6, which has its own Linux version, and one game made for Windows, which ran through Proton as far as its first screen. That is all we have seen of Proton on a real PC. Counter-Strike 1.6 and other games on the same old engine need build 20261009f or newer. Today's installers install a newer one. A PC installed with the first installer, offered on 9 October 2026, gets it with its first update and restart. Some multiplayer games refuse to start on Linux systems because of their anti-cheat. Check the games you cannot do without before you switch.
Do I need a 24HG account?
You can look around without one. Your profile, your friends and your servers need you to sign in. A 24HG account is free, and you need to be 13 or older.
Do I need Steam?
For your games, yes. You sign in to Steam on Atrium as on any PC. Your library and your saves stay with Steam.
Does it ask for my password when it starts?
No. Atrium signs in to your account by itself when the PC starts, so anyone who can switch the PC on gets your desktop and your signed-in apps. The password is asked when something needs an administrator, and after you log out.
Which keys are worth knowing?
They are on a page of their own: keyboard shortcuts. The Windows key opens the application list, and Windows key+L locks the screen.
Which apps come with it?
A browser, Steam, and the standard apps that install themselves at the first start, among them Discord, OBS Studio, Prism Launcher for Minecraft, and Mojang's Minecraft launcher in a Flathub community package. The App Store button has more. It opens the store of the system underneath, which has a page of our own picks under its tab "Curated".
Updates and privacy
How do updates work?
New versions arrive by themselves, within about an hour after the PC starts, or during the night if it is left on, and take effect at the next restart. Check for updates looks at once if you want that. An update replaces the whole system in one piece, and the version before it stays on the disk.
How do I know an update is yours?
Every update we publish is signed. Atrium checks the signature before it takes an update and refuses one that is not ours.
What does Atrium send?
It asks our update server for new versions, and we count them from a log that does not hold your internet address. Once a week Atrium sends a small count to Fedora and the other software sources that ask to be counted; it is on from the first start and you can switch it off. Atrium has no program that reports to 24HG about you or your computer by itself. The 24HG window shows our website, which sees your visits like any website and can read the Atrium version, which Steam games are installed and, for the Send feedback page, which of our three systems it is, the graphics card and a memory range. Send feedback sends your message, and attaches those details only if you tick their box. The download page says more, the privacy policy has a section on Atrium, and the full text is in Atrium under Privacy and reports.
Help
Something does not work. Where do I say so?
With Send feedback, in the application list (from build 20261010f on), or on the Discord, with the make of the PC and what you saw. We read both.