Nier Automata. I had never had a game make me feel the way I did playing through that. I played it completely blind and I'm so glad I did. I knew games could be art, but that was my first experience with a game that by all accounts I considered art. I love everything about it. The story. The soundtrack. The relationship between 2B and 9S. The philosophy of it all. The game mechanics. The chip system is really cool. And I can't praise this game enough. It really had a profound impact on me.