You're running on llvmpipe, i.e. software rendering. Not sure what's going on on your setup, but there's got to be someting massively borked somewhere.
Thanks for pointing that out, it led me to a nixpkgs issue tracking the problem. Turns out it was a regression in Steam's packaging on NixOS so I just had to switch Steam from 25.11 to unstable to fix it. Not a Proton issue, closing :)
proton experimentalx1 2026-05
The game launches to a black screen and is killed by the OOM killer after consuming all available system memory. Proton Experimental, Hotfix, and CachyOS Proton all exhibit this behavior while Proton-GE does not.
Software information
007 First Light
System information
Log files
steam-3768760.log