seen a lot of games with native linux ports, always need to use proton because usually the native ones won't even launch successfully. the only one that works almost 100%, golf with your friends.
Tomb Raider 2013. I specifically bought it when it got Linux support. The difference between the Linux and the Windows version are night and day. So much better graphics and performance with Proton.
The port was done by another developer, Feral. As far as I know they used a tool to port the Direct3D stuff to OpenGL. But nowadays DXVK does the job much better.
But by now the support contract has ran out. So when the Windows version improved the Linux version just stagnated.