Valve's latest Proton update fixes a nasty Diablo IV game-breaking bug on Linux

Published Jul 24, 2026, 2:12 AM EDT Simon is a Computer Science BSc graduate who has been writing about technology since 2014, and using Windows machines since 3.1. After working for an indie game studio and acting as the family's go-to technician for all computer issues, he found his passion for writing and decided to use his skill set to write about all things tech. Since beginning his writing career, he has written for many different publications such as WorldStart, Listverse, and MakeTechEasier. However, after finding his home at MakeUseOf in February 2019, he would eventually move on to its sister site, XDA, to bring the latest and greatest in Windows, Linux, and DIY electronics. Sign in to your XDA account Summary The Proton 11.0-2 release candidate fixes a critical Diablo IV launch error. It also includes fixes for Metal Gear Solid V, Marvel Rivals, Arc Raiders, and Path of Exile. The new version adds AsteroidsHD, Portal Worlds, Warhammer: Dark Omen and others as compatible games. Valve's Proton layer has been one of the best things to happen to gaming on Linux, but it's by no means perfect. Fortunately, Valve has been working hard at fixing any problems that may arise, while also adding new games into the mix. The latest release candidate build, Proton 11.0-2, has been released, and with it comes a critical fix for fans of Diablo IV. Proton 11.0-2 fixes a critical issue with Diablo IV Plus, more games are compatible with Proton now Over on the project's GitHub page, Valve details what Proton 11.0-2's release candidate has in store. The biggest tweak is a fix for an error when launching Diablo IV, which, until now, required an emergency patch to fix. Now, said patch has been added to the release candidate build, and once testing is done, it'll be released for all devices running Proton. The update also brings with it some critical fixes for some popular games, including Metal Gear Solid V, Marvel Rivals, Arc Raiders, and Path of Exile. If your game hasn't been running well under Proton lately, give this release candidate a try and see if it fixes things. Proton 11.0-2 also brings the following games into the fold: AsteroidsHD Heroes of the Three Kingdoms 7 Konkan Coast Pirate Solutions Otherworld Legends 战魂铭人 Portal Worlds SMILE GAME BUILDER Tetrageddon Games Warhammer: Dark Omen (Classic) If you don't want to wait for this version to release on the stable branch, you can grab the release candidate by finding Proton 11.0 in your Steam Library, right-clicking it, clicking "Properties," and then "Betas." Alternatively, it should arrive in the stable branch soon enough.