Thanks to the masses of people for letting me know. Undertale, the 2D RPG where you don't have to destroy anyone is now available for SteamOS and Linux.
Cubway is a journey with an abstract story of lifecycle of rebirth, called Samsara. Guide the cube through the long way full of dangers and difficulties, visit many interesting and mysterious places.
I've enjoyed a great many hours in RimWorld. It has charming visuals much like Prison Architect, but you're building a colony with a choice of different AI behind the scenes.
Tahira: Echoes of the Astral Empire, a tactical turn-based RPG in which a 20-year-old princess must save her people from a genocidal empire, launches on Linux on August 31, 2016.
Arcen Games, LLC latest game In Case of Emergency, Release Raptor is a very silly themed game and it's having repeated delays. It will now launch on July 21st.
Slayer Shock is the next game from David Pittman (Eldritch, NEON STRUCT) and Minor Key Games (Super Win the Game, Gunmetal Arcadia) that will see you hunting vampires.
The developer of Undertale replied to a user question about what is going on with the Linux port. The user shared it on the Steam forum for all to see.
Black Ice is a game I have followed for a long time (and personally purchased a copy) and it just released a rather nice update. If you're an FPS fan and looking for something to sink some time into, this could be what you need.
Wizard of Legend is currently on Kickstarter and the great thing is that they built a demo game to show off, it has Linux support and it's pretty cool.
I feel bad for the Battlestation: Harbinger developer, as I think it's a pretty nice name but another developer has coined the "Battlestation" term so they have to change their name. They will also be doing a free update soon.