Easily 2017. I have three games from it in my top 20 - Hollow Knight, Breath of the Wild, and Nier: Automata. And then there's so many other great games from then, Super Mario Odyssey, Sonic Mania, Metroid: Samus Returns, Splatoon 2, Night in the Woods, Little Nightmares, Cuphead... and that's just from games I've played, other highly rated releases include Nioh, Horizon Zero Dawn, What Remains of Edith Finch, Hellblade: Senua's Sacrifice, Pyre, Mario + Rabbids, and so many more - and Persona 5 if we include that (2017 outside of Japan). Absolutely insane year.