Not a game release. A build dependency for the Linux / Steam Deck version.
Dawn at encounter/dawn 266c1cf8 (the commit the prebuilt v20260618.032059 package is made from) with dawn-hdr.patch: a 10-bit Vulkan surface is offered and created as HDR10 (BT.2020 PQ, VK_EXT_swapchain_colorspace), which the Steam Deck's Game Mode (gamescope) shows as HDR. Built with the options of encounter/dawn's release CI by tools/deck/build-dawn-hdr.sh in a Debian 13 container. The CMake build fetches it on Linux x86-64 and checks its SHA-256.
dawn-linux-x86_64-hdr.tar.gz SHA-256 d0926c99d472414973561c1bc3c0b0832b69981167a33b8c81689739ef1358ea
Dawn is BSD-3-Clause (LICENSE-dawn inside the archive).