Quite a few, Bloodborne, Dark Souls 2 SOTFS, Dark Souls 3, Everybody's Gone to the Rapture, Virgina, Titanfall 2, Doom, Abzu, and Gone Home are all what come to mind off the top of my head.
I imagine i'll be playing Tetris Effect on and off for the next 20 years. I've also played the PS4 version of Dear Esther countless times, but that doesn't really count as a game of this generation, and i'd played the mod version and Source release before the Unity version.