Console comfort.
PC freedom.
Castalia GOS is a gaming operating system that treats your evening like it matters: atomic updates, one-click rollback, a couch-ready Gos Mode, and a full KDE desktop — guided by Bru, a loyal Catalan hound.
Pre-alpha — nothing installable is published yet
🎮 Two faces, one system
Boot to Gos Mode — a controller-first, console-like session — or to Desk Mode, a full KDE Plasma 6 desktop. Switch any time.
🛡️ Hard to break, easy to undo
The OS is an immutable, signed image. Updates apply on restart; a bad one rolls back with one click. Your games and saves are never touched.
🐕 A guide, not a wiki
Castalia Portal walks the first boot; Castalia Kennel keeps updates, performance, and diagnostics in one place. No terminal required — always available.
🔒 Private by default
No telemetry. No forced accounts. No corporate sludge. Diagnostics exist only when you build them, and you read them before anyone else.
🔬 Know your machine
Castalia Pedigree inspects every component — CPU, GPU, memory, storage, sensors — and benchmarks it into one honest number, the Bru Score. No root, no telemetry, no terminal required.
👾 Joy in the firmware
Castalia Arcade ships three tiny, immaculate games for the space between games — pure code, no assets, records that never leave your machine.
🕹️ Steam-ready, honestly
Steam preinstalled, Proton tuned, MangoHud and Gamescope in the box. And the truth up front: kernel-level anti-cheat titles won't run — check before you buy.
🤲 Standing on giants
Built openly on Bazzite, Universal Blue, and Fedora Atomic. We add product, polish, and personality — not a reinvented base.