I've been playing a couple new-to-me games lately, Plague Inc and Guntouchables.
I can see why Plague Inc is so popular. It has a bit of that "one more turn" feel to it for me, and it is interesting how you can employ different strategies to try to win. I find it to be a decent game for relaxing after a tough day of work (though it could also be frustrating when you lose).
Guntouchables I got for free when it first launched and just played it yesterday with some friends (who also got it for free). It is a fairly simple co-op rogue-lite top down shooter, but I think it is well executed, and I enjoyed the couple runs we had. I'll probably buy the supporter pack DLC for this at some point, because I do feel it deserves that.