GloriousEggroll has released an updated custom build of their 5.9 Proton fork with another important fix.

Ok, so I found another important fix... so I went ahead and just said screw it and took yesterdays update and added it on to today's release to make people more aware. This build should be used as its basically a bunch of hotfixes on top of GE-7-ST.

-Death Stranding working again (found the issue that broke it in GE-5-ST, it was a woopsie on my part).

-Death Stranding Red Halo and issue fixed

-Baldur's Gate 3 DX11 crash fixed

-Baldur's Gate 3 will now ask you if you want to use Vulkan (No=DX11)

-Baldur's Gate 3 still requires AMDVLK on AMD if you want to use Vulkan, DX11 works fine.

-Serious Sam 4 will now ask you if you want to use Vulkan (No=DX11)

-Serious Sam 4 Nvidia still crashes in-game with Vulkan. DX11 works fine.

-Serious Sam 4 flicker workaround found and applied.

-Halo: MCC -- vcrun2019 fix applied -- should fix coop campaign multiplayer desync

-Just Cause 4 patches backported -- game works now

-Watch Dogs 2 eac launcher and nosplash options added to protonfix

-Soul Calibur VI -- I found out the game actually works but you need to 'press any button' before the 'press any button' audio finishes, or it will freeze.

-vkd3d has been updated -- Horizon Zero Dawn fullscreen mode should be fixed now.

-dxvk was updated with the latest release which fixes some previous major crash issues.

For those having the the issue with Horizon Zero Dawn running out of memory and crashing -- I'm curious if you're on intel or amd cpu, and if you're on amd, could you try adding clearcpuid=514 to your kernel boot options? I realized that I had this set for troubleshooting another different game issue during my first testing of HZD, and that I didn't hit any crash issues during that time, and am wondering if it is playing any part with this issue.

Download Proton 5.9-GE-8-ST from GitHub
Installation Instructions