Source Steam Blog store.steampowered.com
A fresh update is here for Proton Experimental to get even more Windows games working on SteamOS / Linux. Read the full article here: https://www.gamingonlinux.com/2026/09/proton-experimental-gets-fixes-for-arm64-ea-app-modern-warfare-2-2009-ragnarok-the-new-world-and-more/