This is my GOTY list:
1- Witcher 3. Simply one of the best games I played. 130 hours and more, not a single boring moment.
2- MGSV. Yeah, the plot is garbage, repetitive, but I really like the gameplay and I'm still playing it online, so it was worth for me, so worth to gain the second place anyway.
3- Undertale. Because it's simply one of the best surprise of this year, and when you think you beated it the first time, well, you didn't. The second play is mandatory to full appreciate it, a gem, brilliant writing, awesome gameplay, zero boring moments.
4- Life is Strange. Really loved the writing here, the plot, the right mix between Donnie Dark and Stand by me, the soundtrack, even the gameplay, since it's required to do something else instead of "just keep pushing some buttons and proceed" like in TT games. Also some choices were very very hard, so I list it here, in its right place in my GOTY list.
5- GTAV. I do not like free roaming games at all, in fact when I play them, I only do main missions. And this is what I did with GTAV too, but the plot was very funny, characters are unique, the gameplay is not too hard and I appreciated each one of the 60+ story missions. I hate GTA franchise (except for Vice City), but I loved V.