Hello @enygma315, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/6241#issuecomment-3263315943.
ge-proton10-8x1 2025-09proton 9.0x1 2025-09proton experimentalx1 2025-09proton hotfixx1 2025-09PROTON_USE_WINED3D=1x1 2025-09PROTON_USE_WINED3D=1 %command%x1 2025-09
Compatibility Report
System Information
GPU: AMD Radeon RX 6950 XT (radeonsi, navi21)
Video driver version: Mesa 25.1.5 (Pop!_OS 22.04)
Kernel version: 6.12.10-76061203-generic
Link to full system information report attached as steam_system_info.txt steam_system_info.txt
Proton version: Proton 9.0.4, Proton Experimental, Proton Hotfix, GE-Proton10-8
I confirm:
steam-1182900.log
Symptoms
The game fails immediately on launch with the following Wine/Proton assertion error:
winevulkan/loader_thunks.c
Expression: "status && vkCreateComputePipelines"
The crash happens before the game reaches the main menu.
When forcing WineD3D with
PROTON_USE_WINED3D=1 %command%
…the game behaves differently (black screen / crash) but avoids the Vulkan assertion. This suggests the issue is in the DX12 → Vulkan path (VKD3D-Proton + Mesa).
Other Unreal Engine 5 games on this system run without issue.
Reproduction
Install A Plague Tale: Requiem
Launch with Proton Experimental (or other tested Proton versions)
Observe immediate crash with the vkCreateComputePipelines assertion
Proton log: attached as steam-1182900.log
Steam system information: attached as steam_system_info.txt