I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly checked on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly.
El Presidente returns for one more try at building a prosperous city on the island state of Tropico, as expected the release comes with official Linux support.
Pathway definitely looks like an interesting game, developed by Robotality (Halfway) and published by Chucklefish (Starbound, Wargroove) and there's new footage up on it.
Last Epoch is turning out to be an impressive action-RPG with good Linux support, with a developer I've been impressed with and a huge new feature-filled build is out.
Spoxel is a sandbox adventure RPG very much like Terraria with a different graphical style, complete with the little slimes hopping around and all. However, it does some interesting unique things too.
Remember Hellpoint? Developed by Cradle Games, it went to Kickstarter and got funded back in 2017. They had a Linux demo too and they now finally have some new footage.
Robot Wants It All is not just one game, it's a bunch of games originally written by Mike Hommel in Flash over the course of several years. They're now being bundled together in an updated form and the release is coming soon.
Sipho from developer All Parts Connected is a very interesting action and survival game, one where you create a creature from blocks inspired by Siphonophorae.
Cyber Shadow from developer Aarne “MekaSkull” Hunziker and publisher Yacht Club Games (Shovel Knight) looks seriously good and the good news is that it will come to Linux.