When attempting to run Portal through GameNative (which uses Winlator Bionic) the game will freeze with graphical corruption on the loading screen texture. The Valve intro video will play normally though, albeit with some banding. The same freeze (minus the corruption) also happens on another device of mine with the Mali G57 MC2.
Logs attached are from the Pixel.
wine_debug.log.txt
Wrapper log: https://drive.google.com/file/d/1yr5M2kPoIts-_zaSvjcstk81SDw0pIXH/view
(had to be uploaded elsewhere because GitHub said no. Sorry