Proton-GE-Custom

Proton-GE-Custom is an unofficial compatibility tool for Steam Play that builds on Valve’s Proton and Wine codebases to provide additional patches, fixes, and enhancements for running Windows games on Linux systems through Steam, particularly on Steam Deck and other Linux gaming platforms. Unlike the official Proton builds, this custom fork includes community-developed patches such as media foundation support, raw input improvements, AMD and Nvidia optimizations, and broader compatibility tweaks that help certain games launch and run more reliably or with better performance. It also incorporates a “protonfixes” system that applies per-game adjustments automatically, enabling environment variables or workarounds without manual user intervention. Because it packages its own versions of DXVK, VKD3D, and other components, this tool can resolve glitches or missing features in titles that struggle under standard Proton builds.