The Humble Award Winners Bundle has just gone live, which includes some highly rated games with the chosen charity for this bundle being Direct Relief. They're one of the charities currently involved in helping fight against Coronavirus (COVID-19).
In the $1/£1 tier they have SIMULACRA and Diaries of a Spaceport Janitor, sadly neither have Linux support but may work to some degree with Steam Play Proton.
Things get more interesting if you pay more than the average as you get Quadrilateral Cowboy which does support Linux and Yoku's Island Express (no Linux there).
However with the top tier there's Yuppie Psycho and Owlboy, two very popular games and both of which support Linux. Plus SINNER: Sacrifice for Redemption (no Linux again on that).
So in total there's only a couple that support Linux, even so they're definitely quality games worth checking out. I personally enjoyed Owlboy a lot and think it fully deserves the high ratings it has been given for the wonderful style and gameplay.
See the full bundle here.