Vector 36 isn't like a lot of other racing games. Instead of a car, you're racing inside a vehicle which hovers above the surface and it's quite interesting.
Jupiter Hell is a roguelike I'm following with great excitement, it's serving a the spiritual successor to DRL (previously DoomRL, now called DRL since ZeniMax flexed their legal muscles) and it's looking good.
While Warhammer 40,000: Gladius is a pretty good strategy game, it did feel somewhat limited. Things are about to get hectic, prepare your defences for the Tyranids.
Good Company, a business management tycoon sim is a recent discovery and it will be coming to Linux. It looks stylish too, so hopefully it will be good.
Artifact, the big new card game from Valve isn't doing so well but Valve won't be giving up any time soon. The first major update is out, with a progression system due soon.
Kingdom Two Crowns, the third in the Kingdom series released recently for Windows and Mac. It looked like we weren't getting it, but it's now confirmed to be coming.
Metropolisim from developer Halfway Decent Games is releasing next year, with a pretty bold aim to be the deepest city-building simulation experience ever.