A recent discovery after randomly going through my Steam Discovery Queue is What Never Was, a short and free story-driven adventure game from Acke Hallgren.
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.
While 9 Monkeys of Shaolin did have a pretty big delay, Sobaka Studio have just recently announced a new release date (including Linux support) along with help from Koch Media.
The Mean Greens - Plastic Warfare, which returned to having official Linux support recently has another big update out and they've dropped the price too.
Estranged: Act II, the free game from Alan Edwardes that follows a fisherman, stranded on a mysterious island during a violent storm had a recent update to tweak various issues.
Free from the restrictions of planet Earth, the space exploration, trading and action game 'Helium Rain' from Deimos Games has officially become DRM free on GOG.
Tower Unite, a 'community-based virtual world party game' had a Linux version that was left in Beta since 2016 and eventually it broke. They've now removed it in favour of people using Valve's Steam Play.