It was the first native Linux game I've ever played and I enjoyed every minute of it.
Unreal Tournament 99/2004
It was fun when my reflexes were better. I can't stand no chance anymore since I got old š¤£
RTCW, Wolf:ET
Not as fast-paced as UT99 but still enjoyable.
Metro Last Light/Redux/Exodus
I've played Metro 2033 on Win7 and was really surprised about Metro Last Light being ported to Linux. It was a pretty good port IIRC. Metro Exodus was also really enjoyable but I'm a bit disappointed about the enhanced edition not being ported to Linux.
BioShock: Infinite
Just as I was ready to give up on trying to get B:I running on Wine, 2k dropped the bomb. VirtualProgramming's Linux ports aren't popular, but it wasn't that bad TBH.
Serious Sam 3: BFE / Fusion 2017
SS3 was really showing me the limits of my old AMD GPU but with a more recent one and Fusion 2017's Vulkan power everything went fine.