With thanks to Team17 sending over a copy, I checked out the chaotic cooking game Overcooked! 2. Coming in totally fresh, since I had never played the original.
Stardew Valley is a seriously lovely game, one I keep going back to quite often and the upcoming 1.4 update sounds like it's going to be pretty interesting.
It might not have the production values that Codemasters are able to achieve but Classic Racers still looks like a reasonably good hill-climb racer and it's now on Linux.
Simple Dot seems like it has a nice idea, with you drawing lines to get balls from one end of a level to another. A simple idea but it looks like it does get quite complicated later on.
I'm not usually one for games that have you endlessly wander around, collect resources, build a little and repeat but Forager is so ridiculously charming it's lovely.
You Died but a Necromancer revived you looks like one of those titles that will be equal parts fun and enraging as you avoid traps across multiple small levels.
The Savior's Gang from Catness Game Studios takes some tales from the Bible, tears out some pages and spreads in a bunch of Monty Python styled humour.
For the parents reading, Little Mouse's Encyclopedia, an interactive encyclopedia that has you explore nature and learn while you have a bit of fun is out with Linux support.