Collabora runs Counter-Strike 2 on Windows with Mesa's RADV Vulkan driver

Sources: Collabora, Phoronix, HN 49093435
Summary: Collabora describes porting Mesa's RADV Vulkan driver to Win32 and reports running Counter-Strike 2 on Windows against it. The port still talks to AMD's proprietary Windows kernel driver, through private structures recovered by reverse engineering. Those structures ship as a matched pair with the vendor user-mode driver and carry no backward-compatibility guarantee. Phoronix reports that Valve is sponsoring the Collabora engineers doing the work, and that the alternative to a documented AMD kernel interface is a shim library absorbing undocumented changes between Radeon Software releases.
Why it matters: An open Vulkan driver on Windows would give AMD users one debuggable codebase across platforms, and the reverse-engineered kernel interface is the part that decides whether that holds across driver updates.
Follow-up: Watch for whether AMD documents or stabilises the kernel interface the port depends on.