Valve dropping the CAD files for the new Steam Machine turned “wait for the console” into “build one this weekend”. The seven apps for DIY Steam Machine builds below cover the whole loop, from picking parts, to installing a SteamOS-style operating system, to organizing the game library the console way. All of them are free, and most are open source.
The trick with a DIY Steam Machine isn’t the hardware. It’s picking the operating system that turns a small PC into something a controller-only user won’t get lost in. Most of this article is about that.
What to look for in a DIY Steam Machine app
A DIY console needs a few things stock desktop Linux doesn’t provide out of the box:
- Big Picture at boot. The user should see Steam’s controller UI as soon as the machine turns on, not a login prompt.
- Vendor-friendly graphics stack. AMD works great, Nvidia works with more fiddling. The OS should default to the right driver.
- Handheld tooling. Even if you’re building a desktop console, the same tools that power the Steam Deck (Gamescope, Steam session) make life easier.
- Update path that doesn’t break. Immutable distros or A/B partitioning keep a bad update from bricking the console on a Friday night.
- Non-Steam launcher support. Epic, GOG, EA App, and emulator libraries need first-class handling.
Quick comparison
| App | Best for | Free | Base | Standout feature |
|---|---|---|---|---|
| Bazzite | The most Deck-like SteamOS-style distro | Yes (open source) | Fedora Atomic | Preinstalled Gamescope + Steam gaming mode |
| ChimeraOS | Immutable console-mode Linux | Yes (open source) | Arch | Web-based settings panel |
| HoloISO | SteamOS 3 unofficial installer | Yes (open source) | SteamOS 3 (Arch) | Closest thing to Valve’s own SteamOS |
| Nobara Project | Fedora-based with gaming patches | Yes (open source) | Fedora | Preinstalled game codecs and mods |
| Playnite | Unified library launcher | Yes | Windows | Aggregates Steam, Epic, GOG, emulators |
| PCPartPicker | Spec, price, and check compatibility | Yes | Web | Wattage and clearance calculator |
| HWiNFO | Post-build stability and temperature checks | Yes | Windows | Deep sensor telemetry |
The 7 best apps for building a DIY Steam Machine in 2026
1. Bazzite — Best for the most Steam Deck-like console experience
Bazzite is a Fedora Atomic-based distribution built by the Universal Blue team specifically to give any PC a Steam Deck-style experience. It ships with Gamescope, the Steam gaming mode session, HHD handheld tooling, and the Deck-style KDE Plasma desktop for when you want to switch out of console mode. Boot flow: press the power button, land on Steam’s Big Picture, controller works.
Updates are handled by rpm-ostree with automatic image swaps, so a bad update rolls back on next boot instead of bricking the box.
Where it falls short: Fedora Atomic is unfamiliar to first-time Linux users. Some Windows-only games (kernel-level anti-cheat) still don’t work.
Pricing:
- Free: Full distribution.
Platforms: Linux (x86_64, ARM builds in progress).
Download: Bazzite on the official site
Bottom line: The default recommendation for a DIY Steam Machine in 2026.
2. ChimeraOS — Best for a lean, focused console OS
ChimeraOS is the older of the two console-mode Linux distros and takes an Arch base. Boot goes straight into a Steam Big Picture session. A separate web-based settings panel accessed from another device on the network handles configuration, updates, and library management.
The system is intentionally minimal. If you want the console to be a console, not a general-purpose PC, ChimeraOS is the pick.
Where it falls short: Arch base means users need to be comfortable with pacman for any custom software. Less handheld tooling than Bazzite.
Pricing:
- Free: Full distribution.
Platforms: Linux (x86_64).
Download: ChimeraOS on the official site
Bottom line: The purist pick for a console that only does console things.
3. HoloISO — Best for running actual SteamOS 3
HoloISO is the community project that packages Valve’s SteamOS 3 for non-Deck hardware. The result is the closest thing to running Valve’s official Deck OS on a desktop PC. Compatibility is best on AMD hardware; Nvidia support is a known challenge.
Because it tracks Valve’s releases, HoloISO benefits from every SteamOS patch Valve ships. It also inherits every SteamOS limitation.
Where it falls short: Officially unofficial. Nvidia support is spotty. Not a substitute for Bazzite if you value stability.
Pricing:
- Free: Full distribution.
Platforms: Linux (x86_64, AMD hardware preferred).
Download: HoloISO on GitHub
Bottom line: The pick if you want to run the same SteamOS Valve ships on the Deck.
4. Nobara Project — Best for Fedora with gaming patches out of the box
Nobara Project by GloriousEggroll is a Fedora spin with gaming patches, media codecs, drivers, and workarounds preinstalled. It boots into a normal desktop, not a Big Picture console, but the “just works” gaming experience is why many DIY Steam Machine builds start here and layer Gamescope on top.
For users who want a machine that games well but also does normal desktop work when the controller is put down, Nobara is a strong option.
Where it falls short: Not a console-mode distro. You configure the Big Picture autologin yourself.
Pricing:
- Free: Full distribution.
Platforms: Linux (x86_64).
Download: Nobara Project on the official site
Bottom line: The pick if you want a gaming distro that also handles daily driver work.
5. Playnite — Best for a unified library on Windows-based builds
Playnite is the launcher aggregator that Windows-based DIY console builds default to. Point it at your Steam, Epic, GOG, EA App, Ubisoft Connect, Xbox Live, and emulator collections and get one library UI that a controller can navigate. The Fullscreen mode is designed for a TV.
For a DIY console running Windows because of anti-cheat compatibility, Playnite is the missing console shell.
Where it falls short: Windows-only for the polished experience. Adding a source often requires app-specific plugins that lag behind vendor changes.
Pricing:
- Free: Fully free (open source).
Platforms: Windows.
Download: Playnite on the official site
Bottom line: The launcher a Windows-based DIY console needs.
6. PCPartPicker — Best for planning the build before you buy
PCPartPicker is the web tool every custom PC build starts on. Pick CPU, GPU, motherboard, memory, storage, PSU, and case; PCPartPicker checks socket compatibility, PSU wattage headroom, and physical clearance. For a Steam Machine specifically, the compact case category and low-profile GPU filters are the ones you’ll use.
The build price tracker also alerts on price drops for parts still in your cart.
Where it falls short: Compatibility checks are 95 percent good, not 100 percent; some obscure clearance issues still slip through. Community pricing is US-centric.
Pricing:
- Free: Full web application.
Platforms: Any operating system with a browser.
Download: PCPartPicker on the official site
Bottom line: Plan every part here before the first Amazon order.
7. HWiNFO — Best for post-build stability checks
HWiNFO is the sensor tool that tells you whether the small case you crammed everything into is actually cooling under load. Boot into Windows once (or run under Wine on Linux) with HWiNFO in the background, run a game session, and read out max CPU/GPU temps, VRM temps, and fan speeds.
If any of those numbers scare you, you learned that before it fried something.
Where it falls short: Windows-native; Linux equivalents (lm-sensors, MangoHUD) exist but are less polished. Deep menu tree.
Pricing:
- Free: For personal use.
- Paid: Pro licence for commercial use, around $30.
Platforms: Windows.
Download: HWiNFO on the official site
Bottom line: Do a thermal shakedown run before the machine goes under the TV for good.
How to pick the right DIY Steam Machine stack
Different builders want different tradeoffs:
- You want the easiest “just works” console experience: Bazzite.
- You want a minimal Arch-based console OS with web management: ChimeraOS.
- You want actual SteamOS on desktop hardware: HoloISO (AMD preferred).
- You want a desktop gaming OS that isn’t console-only: Nobara Project.
- You need Windows for anti-cheat but want a console UI: Playnite Fullscreen on Windows.
- You haven’t ordered the parts yet: PCPartPicker first.
- You built it and want to be sure it’s stable: HWiNFO.
A typical DIY Steam Machine 2026 build uses PCPartPicker for the parts list, Bazzite for the OS, and HWiNFO for the thermal shakedown. That’s three of the seven and gets 95 percent of the way there.
FAQ
Can I install SteamOS on any PC?
Not officially yet, but community projects like HoloISO package SteamOS 3 for desktop hardware. Bazzite and ChimeraOS give a similar experience on Fedora and Arch bases respectively.
Does a DIY Steam Machine work with Nvidia cards?
Bazzite has strong Nvidia support. HoloISO is more restricted; AMD is the safe choice for SteamOS purists.
What operating system does the new Steam Machine run?
Valve’s Steam Machine ships with SteamOS 3, the same OS as the Steam Deck. DIY builders can use HoloISO to run the same OS, or Bazzite for a maintained Fedora-based equivalent.
How much does it cost to build a Steam Machine?
Entry-level builds start around $500 with used or budget parts. A build matching or exceeding the official Steam Machine specs typically costs $700 to $1,200 depending on GPU choice.
Can I play anti-cheat games on a Linux Steam Machine?
Some yes, some no. EAC and BattlEye have Linux support that developers must enable per game. Kernel-level anti-cheat games (Vanguard, some EA titles) still won’t run.
