Yeah i manage to get Windows games running perfectly great on Zorin OS or Pop! OS. Most games run perfectly stable @60fps (Halo the Masterchief Collection, Need for Speed Hot Pursuit Remastered, Mass Effect Legendary edition and so on).
I have GTA 3, GTA Vice City and GTA San Andreas the definitive edition. That one is at most 55-60 fps but has sometimes framedrops to 35-45 fps and back up to 55-60. Now i have read Windows users have the exact same problem with those games duo the lack of optimization.
Halo the Masterchief Collection runs better for me in Pop! OS then it did in Windows 
Halo: Combat Evolved (The Master Chief Collection / Remastered / New Textures)
Halo: Combat Evolved (The Master Chief Collection / Remastered / Old Textures)
Halo: Combat Evolved (The Master Chief Collection / Remastered / New Textures)
Halo: Combat Evolved (The Master Chief Collection / Remastered / Old Textures)
Halo: Combat Evolved (The Master Chief Collection / Remastered / New Textures)
Halo: Combat Evolved (The Master Chief Collection / Remastered / Old Textures)
Pressing a button you can see old and new, it's really awesome how they remastered the game.