Valve Releases Proton 6.3

original sin 2 runs on Proton 6.3

We knew it was coming, and here it is: the latest Proton now rebased on top of WINE 6.3 (dating from end of February, so Proton is behind the dev branch by a month or so). Proton 6.3 should now show up on Steam for you all. So what’s new this time around? You can play the following games with this latest Proton version:

  • Divinity: Original Sin 2 (it was never released for Linux despite indications that it might)
  • Shenmue I & II (making the whole trilogy playable now!)
  • Mass Effect 3 N7 Digital Deluxe Edition (2012)
  • Tom Clancy’s Rainbow Six Lockdown
  • XCOM: Chimera Squad (while it was already playable before)
  • Bioshock 2 Remastered
  • Company of Heroes 2
  • logiCally
  • Rise of the Triad
  • Home Behind 2
  • Shadow Empire
  • Arena Wars 2
  • King Arthur: Knight’s Tale
  • Rise of Venice
  • ARK Park
  • Gravity Sketch
  • Battle Arena VR

This comes with an update of all related libraries:

Also, may changes that made it to Experimental before have now been merged into this Proton 6.3.1:

  • Improvements for non-US keyboard layouts.
  • Improved video support.
  • Support setting thread priorities via RTKit, or Unix priorities if your user has permissions.
  • Controller layout and hotplugging improvements in Slay the Spire and Hades.
  • Improved PlayStation 5 controller support.
  • Improved Virtual Reality startup time and compatibility.


  • Improved Uplay sign-in.
  • Improved G29 steering support in Assetto Corsa Competizione.
  • Fixed Microsoft Flight Simulator in VR mode.
  • Fixed cutscenes in Bioshock 2 Remastered.

Here’s a few games running on this new Proton version. Death Stranding has great performance now:

Dying Light:

World War Z with Proton 6.3-1 through the Epic games Store (in Legendary):

You may however experience some regressions. For example, Podiki has tried Monster Train on 6.3, and the introduction video does not seem to play anymore (the game still plays fine however).

It will take a while to assess how most titles are impacted (positively or negatively) and we shall know a lot more a month from now when ProtonDB reports are updated with 6.3.

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