Valve just pushed Proton 11 Beta 5 to patch controller input failures and reverse performance drops that broke several popular games. The update restores smooth gameplay in Terraria and BattleBit Remastered while fixing a stubborn menu navigation bug in Deus Ex: Mankind Divided. Players will also appreciate the Arma 3 patch, which finally stops the launcher from wasting bandwidth by re-downloading workshop mods on every startup. Assassin's Creed Shadows gets added back to the playable list, so Steam Deck owners can jump right into the latest beta without hitting those familiar compatibility walls.

Proton 11 Beta 5 Resolves Critical Regressions and Controller Glitches for Steam Deck Users

Valve Software dropped Proton 11 Beta 5 to patch controller input failures and reverse performance regressions that broke several popular titles. This update targets specific compatibility issues affecting Deus Ex, Mankind Divided, BattleBit Remastered, Terraria, Arma 3, and Assassin's Creed Shadows. Users running the latest beta can expect smoother gameplay without unnecessary background updates or degraded frame rates.

Controller Input and Performance Fixes in Proton 11 Beta 5

Valve addressed a controller input issue in Deus Ex: Mankind Divided that likely left players unable to interact with menus or characters properly. A common frustration involves controllers failing to register clicks during dialogue choices, which forces a restart and wastes time. The fix ensures gamepads register inputs correctly across the board, which matters for anyone trying to navigate complex RPG interfaces without a mouse. Performance regressions also made their way into this build previously, causing Terraria to run slower than it did on Proton 10. That drop in performance should disappear now, restoring the fluid movement and combat responsiveness players expect from the sandbox adventure. BattleBit Remastered and Assassin's Creed Shadows were also flagged as broken in earlier versions of the beta, but Valve confirmed both titles are playable again after applying necessary patches.

Arma 3 Workshop Update Bug Finally Gets Squashed

The Arma 3 workshop mod update loop was one of the most annoying regressions in recent builds, triggering unnecessary downloads every time a user launched the game. This behavior consumed bandwidth and storage space while delaying access to the actual gameplay session. Valve has corrected this logic so mods no longer force redundant updates on each launch, saving users from waiting around for files that are already up to date. The fix restores sanity to the Arma 3 experience by respecting the local cache and only checking for changes when they actually exist.

Release proton-11.0-1-beta5

This is a small update, for full Proton 11 changelog see beta1. Fixed controller input issues in Deus Ex: Mankind Divided. Fixed Proton 11 regressions: BattleBit Remastered is playable again.

Release proton-11.0-1-beta5 · ValveSoftware/Proton

Give the beta a spin if you are hitting any of these issues and let us know how it goes on the forums. Happy gaming.