MTZehvor on 19 December 2015
I'd probably go with Undertale, despite the significant amount of backlash it's received since the Gamefaqs contest. Simple game with an engaging storyline, a fun take on traditional turn based combat, and, perhaps above all else, the amount of self awareness the game has and how it consistently manages to be funny while breaking the fourth wall is something I found extremely enjoyable.
Not a particularly strong year for video games all around, though, so perhaps that's saying less about Undertale and more about how disappointing everything else was.
