P.S. It's my second Github isssue report ever, so sorry for low quality structure.
I have tested two UE 4 games which ran horribly while rendering the world. So that makes main menus work completely fine (unless they render the world and menu at the same time, applies to the 2 games below):

• Astroneer
• Vladik Brutal

Note about Vladik Brutal: it uses a fork of UE 4.

The Issue

Games will render at probably 1 FPS and crash in about 10 - 30 seconds.

Speculations

Originally I thought it's some issue regarding DirectX 11, and so I put that to the test: Stalker Anomaly in DX11 mode seemed to run fine.

Alternatives

1. This version of Proton-GE seems works just fine with the mentioned UE 4 games.
2. I hadn't fiddled around with any launch parameters yet, maybe you can instruct me.
3. We could test a cracked copy of one of the games (for example, Astroneer) in Lutris with Proton-Sarek and determine if it's actually an issue regarding Steam?

• I'd like to try the following runner setup as well in testing that game: Wine-10-Staging-tkg-ntsync with DXVK-Sarek-Async.
• The runner setup above was the only thing that would run the Stalker Multiplayer Extension (xrMPE) for me, just noting this here.

Info

Proton-Sarek version (normal & async = same results); from ProtonPlus: 10-4
Steam version: package (latest)
Late Edit
Driver: 470 Proprietary
Proton 7.0-6 worked, after installing Windows Dependencies

Fastfetch output (attached file)