SUPERHOT, a first-person shooter where time moves extremely slowly until you move, released originally way back in February 2016, just got a rather nice update for Linux gamers.
Flippfly (Race The Sun, Evergarden) have announced Cats Fly Helicopters, an amusing sounding game about being a cat flying around a simulated city full of physics and emergent gameplay. On the topic of Linux support, they had some comments for me when asked.
Puzzle games don't get much more streamlined than this, Jetstream has a very easy-going atmosphere combined with super simple controls making it easy to get into.
Renaine is one I don't remember hearing about before, originally funded on Kickstarter this absolutely gorgeous pixel-art platformer is coming out this year and you need to take a look.
Apparatus, a name I honestly had never heard of until recently is a physics puzzle game developed on Linux. As it turns out, this is a reboot of a game that was popular in the early days of mobile touchscreens.
Geneshift, a top-down GTA-inspired battle royale game that also has a single-player and co-op campaign has a fresh update out with an aim to make it more streamlined to play.
Road to your City is a city builder but it's not the usual kind, with a focus on building up a Football team to go along with your city it's pretty interesting to play.
Forager from developer HopFrog and publisher Humble Bundle looks like a pretty fun mash-up of different genres, inspired by the likes of Stardew Valley, Terraria & Zelda and it's going to support Linux now too.