Witcher 3 - After reading the books it was so much fun to get to have Ciri in the video game series. The attention to detail and the great amount of side quests to get lost in that didn't feel like open-world fluff most of the time made it one of the best experiences of the year.
Bloodborne - Finally made the souls games really click with me after having toyed around with all of them near their respective releases. It was a bit short and a bit on the easy side, but I guess that made the previously mentioned possible. With the release of SotFS, I was motivated to give DkSII a second chance and played through it and loved it. Went back to DkS 1 since it had also gotten the steam patch this year and I absolutely adored it (I only got to Anor Londo last time I had played it) tried Demon's Souls and the framerate gave me nightmares so I put it down.
Life is Strange - Really enjoyable game that I felt finally really got the episodic game formula down right. An extremely pleasant chill-out game for the most part with exciting twists and turns with choices that genuinely made an emotional impact with me.
Tales From the Borderlands - Telltale's finest work yet, I'm a sucker for a good late title card, and TFtB has five of them, and they're all so good. Loved the characters and the voice acting (although I'd listen to Laura Bailey say anything, her voice is so awesome). Actually made me care about the borderlands universe which I thought was impossible after how schlocky BL2 was.
MGSV - The story was a pretty big disappointment, and the microtransactions made me feel violated and left a bad taste in my mouth, but man, that base game is so good. All I asked for was ground zeroes but more, and MGSV delivered.
SOMA - Didn't execute the survival horror as well as I wanted it to, but it was a great experience that delved into subjects that I'm constantly thinking about, so it really was right up my alley.
Dirty Bomb - I guess this came out this year. Fast-paced multiplayer shooter with quick movement speeds, wall-jumping and lots of abilities. It hasn't changed the world, it's slightly janky in parts and needs more content, but I'm willing to overlook quite a bit for an online shooter with wall-jumping. I am a simple man.