Have you played a game that stayed in your head long after you played it? For
me, Outer Wilds would be that game. I feel like I haven’t stopped thinking about
it since I beat it a couple years ago.
Metal Gear Solid. All of them, but especially MGS 4 left me speechless and sad-tisfied. I played it pretty much every year until my PS3 didn't want to exist anymore. I still have times where I recall scenes from the whole saga.