Proton Experimental gets fixes for Far Cry 4, Grand Theft Auto III and more

5 Sep 2026 at 2:51 pm UTC
By Liam Squires-Hand

Valve updated Proton Experimental for September 4th bringing more Windows game fixes for players on Linux / SteamOS (including Steam Deck and Steam Machine). The last update was on August 28th with some more fun fixes too, and before that August 19th.

The what — Proton Experimental is a compatibility layer to run Windows games on Linux systems. This one is like their testing ground for future stable numbered version Proton updates. You can install any version of Proton by just searching for "Proton" in your Steam Library. Check out the GamingOnLinux Guide to all the different Proton versions if you're confused.

Below is everything that's changed.

Key Changes

• Now playable:
  • Cool People Club
• Fixed Achron displaying warning about missing fonts.
• Fixed rendering issues affecting the carpet in The I of the Dragon.
• Fixed controller not working reliably in Far Cry 4.
• Fixed Proton 11 regressions:
  • RaceRoom Racing Experience will now load the HUD in-game during races.
  • Lunacid: Tears of the Moon is playable again.
  • Ligo is playable again.
  • Intro videos in Grand Theft Auto III play again.

🌐 External Sources: GitHub - Proton Article taken from GamingOnLinux.com. Tags: Proton, Steam Deck, Steam Machine, SteamOS, Misc, New Release, Open Source, Steam, Valve 6 Likes Some you may have missed, popular articles from the last month:Nexus Mods acquires the popular community site SteamDBWine 11.16 brings more ARM64 support improvementsDirect3D 8/9/10/11 to Vulkan translation layer DXVK 3.1 brings improvements for game launchers, older Frostbite engine and moreReady up for the Steam Frame with the In Your World VR Bundle All posts need to follow our rules. Please hit the Report Flag icon on any post that breaks the rules or contains illegal / harmful content. Readers can also email us for any issues or concerns.