OS Comparison

ChimeraOS

Arch Linux based.
Uses an A/B atomic update system for stable updates, but with a read-only root file system.
Works on almost any PC and has specific support for many handhelds.
Uses Gnome for desktop mode.
Monthly releases that always use the latest vanilla Arch Linux packages.
Includes out of the box support for Epic Games Store and GOG.
Includes many pre-installed emulators.
Includes the ability to remotely install software without needing to resort to using desktop mode and manually adding Steam shortcuts.
Includes automatically applied game tweaks for additional game compatibility.
Includes functionality to automatically download missing artwork for Steam games in Gamepad UI mode.
Includes GE Proton out of the box.
All ChimeraOS code is available in our GitHub repositories.
All ChimeraOS infrastructure is automated and hosted on GitHub making it trivial to fork, build and install a custom version of ChimeraOS.

Arch Linux based.
Uses an A/B atomic update system for stable updates, but with a read-only root file system (just differs in the underlying implementation).
Currently only works on the Steam Deck.
Uses KDE Plasma for desktop mode.
Often includes stale software with many patches to base Arch Linux packages.
No out of the box support for Epic Games Store and GOG.
No pre-installed emulators.
Additional software must be installed from desktop mode and added to Steam manually.
Missing Chimera provided game tweaks.
Has missing artwork for many Steam games in Gamepad UI mode.
No GE Proton included.
Many components are hosted only on internal Valve repositories.
Requires additional infrastructure and your own build system if you want to fork or customize.