What the Latest Proton Experimental Update Delivers
Proton Experimental is Valve’s testing branch of its Windows-compatibility layer on Steam Deck, where early fixes and features land first to improve game performance, stability, and compatibility before they reach wider Proton releases. The latest Proton Experimental update focuses on clearing up frustrating game hangs and crashes that blocked play for several popular titles. Subnautica 2 on Steam Deck was a prime example, with some setups hanging on first launch after install; that issue is now resolved. The patch also restores video playback in Star Wars Starfighter and fixes Far Cry 4 randomly hanging during launch. War Thunder players benefit from a crash fix when pressing “To Battle!”, while Squad no longer stalls on its health warning screen. Together, these changes target real-world problems that kept games from reaching the main menu, bringing more of the Steam library into a playable state on Valve’s handheld.
Subnautica 2 and Other Proton Fixes That Matter
For many players, the Subnautica 2 Steam Deck experience rose or fell on whether the game could even start. The Proton Experimental update now fixes the hang that occurred on first launch after installation on some setups, turning a show-stopping bug into a non-issue. Alongside this, audio issues in Idle Iktah have been corrected, and launch-time hangs in Far Cry 4 and Squad have been addressed, cutting down on those long, uncertain waits at startup. Video playback has also been restored in Star Wars Starfighter, helping cutscenes run as intended. These Steam Deck game fixes highlight how Proton Experimental acts as a fast-moving safety net: players who opt into the experimental layer get immediate relief from critical bugs, while the lessons learned there inform more stable Proton versions later.
Forza Horizon 6 Compatibility and Homeworld 2 Improvements
Another Proton Experimental update zeroes in on Forza Horizon 6 compatibility and classic strategy titles. Forza Horizon 6 previously had a nasty tendency to close after system suspend and resume, which is especially painful on a portable device that thrives on sleep-and-wake sessions. That behavior is now fixed, making it far more practical to pause and return to races on Steam Deck. According to SteamDeckHQ, the patch also resolves Proton 11 regressions that affected Homeworld 2 Classic and SHOGUN: Total War when using alt+tab, preventing black screens and misbehavior when switching tasks. Audio distortion in the intro video for Warhammer 40,000: Dakka Squadron – Flyboyz Edition has likewise been corrected, and Hyperdevotion Noire’s saves now work correctly. New playables, including Warhammer: Dark Omen (Classic) and Portal Worlds, further expand the catalog of games that run under Proton Experimental.
Steam Deck Client Update: Faster Downloads and Better Controls
Beyond Proton Experimental, Valve has pushed a Steam Deck Client update on the Stable channel that improves downloads, networking, and controller behavior. A bug that could slow downloads on some networks has been fixed, so users who saw sluggish updates may notice faster performance now. Remote Play fans benefit from a fix for doubled input when the Steam Controller is connected through a puck, which should restore normal, single-action responses. Controller handling gets broader attention too: the layout of the controller pairing screen on Steam Deck has been improved, joystick LEDs behave correctly on Legion Go, and Steam Controller firmware now supports LED dimming and reduces deadzoning on the lower trigger range. Steam Input also gains a workaround for Linux gamepad emulation issues and reverses trackpad momentum changes that introduced unwanted deadzones at the edges of the pad.
What These Fixes Mean for Steam Deck’s Growing Library
Taken together, the Proton Experimental update and the latest Steam Deck client patch tighten several loose screws that affected day-to-day play. Subnautica 2 now launches reliably, Forza Horizon 6 survives suspend and resume, and strategy mainstays like Homeworld 2 Classic behave correctly when multitasking. On the system side, faster downloads, corrected Remote Play inputs, and more predictable controller behavior reduce friction before you even load a game. These changes enhance the appeal of the Steam Deck’s expanding library, where each incremental fix turns more Windows titles into handheld-friendly options. Players willing to enable Proton Experimental gain earlier access to compatibility improvements, while those staying on Stable still benefit from client updates that keep the hardware and input experience polished. The result is a steadily more dependable platform where fewer technical snags stand between buying a game and comfortably playing it on the go.
