Undertale was quite the experience. I was amused by all of the steam reviews speaking of a toxic community, particularly for a single player game, but I suppose the explosion in the game's popularity got to be a bit much. Still, I'm definitely glad I played it and wouldn't hold that against the game. I also finished Hard Reset, an FPS similar to Painkiller and Serious Sam. I wouldn't put it on the same level as those games and admittedly I was glad that it was over once I had finished it but it was still enjoyable enough for a time.
A coworker recommended Persona 5 and I've been pretty deep into that for the past few weeks. I've never played a JRPG in this vein, nor any of the other Persona games, but it has grown on me.
I've also been trying to fit in some Doom megawads that I've missed... I don't have as much free time anymore so it's tough to keep up.