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HoloISO reimplements SteamOS 3 as a free, libre system intended to bring its functions to more PCs.
About HoloISO
HoloISO is a free/libre reimplementation of SteamOS 3 that aims to bring the Steam Deck's SteamOS Holo redistribution into a generic, installable format for more PCs. It reproduces SteamOS features such as the first-boot OOBE, Deck UI and gamepad UI sessions, Global FSR, shader pre-caching, and A/B system updates with container sealing. On Steam Deck hardware it also adds firmware and dock updaters, thumbstick and haptic motor calibration, amplifier support, fan curve control, and TDP/clock control.
Key features
- Installable generic format of SteamOS 3 with Steam Deck UI
- SteamOS out-of-box experience and separate Deck UI/gamepad UI sessions
- Global FSR and shader pre-caching
- A/B system updates with container sealing
- Native SteamOS addons and core components such as steamos-readonly
- On Steam Deck: dock, BIOS, controller, OS firmware updaters and controller calibration
Best for: Users with AMD GPUs supporting RADV who want a free/libre, generic SteamOS 3-like system on a PC.
Good for
- Free/libre reimplementation of SteamOS 3, with most code and packages from Valve.
- Includes SteamOS OOBE, Deck UI, Global FSR, shader pre-caching, and A/B updates.
- On Steam Deck, provides firmware updaters, controller calibration, fan curve, and TDP/clock control.
Watch out for
- Not official SteamOS; the project describes it as an unofficial reimplementation.
- TDP/FPS limiting is disabled on all systems except Steam Deck and Steam Deck OLED.
- NVIDIA support is not provided now in favor of NVK testing; AMD 7xxx requires testing, and some CPU 7xxx users report an inoperable experience.
HoloISO at a glance
- Website
- github.com/HoloISO/releases
- Category
- Gaming › Game Utilities & Launchers
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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HoloISO FAQ
Is HoloISO official?
No. The project describes itself as a free/libre reimplementation of SteamOS 3 and says most code and packages come from Valve.
Does HoloISO support NVIDIA GPUs?
No NVIDIA support is provided now, in favor of NVK testing. Installation prerequisites still list NVIDIA Maxwell or newer.
What are the installation prerequisites?
An 8GB flash drive, a UEFI-enabled device with Secure Boot disabled, and compatible graphics hardware. More than 8GB RAM is needed for the Copy-To-RAM install option. AMD GPUs need RADV support; Southern Islands and Sea Islands require an additional kernel cmdline property.
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