Oblivion has lived in my head since the moment I first played it back in 09. Finally started teaching myself how to make mods for it last year and now it takes up even more of my brain!

Believe it or not, it was a flash game. You can't play it online anymore, though you can find it for download somewhere I'm sure.

It was called "Obliterate Everything 2" - it was just a small game about space battles, with fairly simple mechanics. But the amount of depth it got from that was so absurd. The difficulty curve was a bit wacky, and I remember talking at length to my friends about the various game design principles I'd learned from observing and judging it.

To The Moon. Barely a game, the dialogue can be really cheesy in places. But dang, I've thought about the ending to that game probably monthly for over a decade. The sequels are an incredible continuation of the story as well.

Loom

It's been, what, 30 years? I still think about that game pretty frequently.

To be honest, for me it's got to be the ending to Nier Automata. That was...intense, thankfully I wasn't spoiled even after playing it so late.

Hellblade: Senua's Sacrifice. When I finished it I couldn't stop thinking about it for a couple of days. It was quite the experience, hearing the voices and learning to trust them. Factorio. The factory must grow.

Interstate '76. I love the whole vibe of it.

Your dog dying in fable (I think fable 2?) :( They make this lovable companion who is your best mate and he just... Dies, still messes me up

Persona 5 Royal. I normally don’t like JRPGs but there is something special about this one game. The design, the music and the gameplay never failed to put a smile on my face

Mass Effect series. Especially ME3 with the DLC's. I think it was the Citadel DLC that I enjoyed the most. The game was really emotional at times.

For me, it's Mirror's Edge, particularly Mirror's Edge Catalyst. I even go running IRL to the soundtrack.

Starcraft, when the first one released and then the expansion, I always wondered what happen to Kerrigan/Jimmy and the Protoss templars. We don't have any official answers all the way until Starcraft 2 released. That "it's about time" trailer was about as hype as I can be for a very long time. And then it faded behind DOTA 2 and LoL.( I didn't even know when the 2nd one or 3rd campaign released. too busy with indie game/kickstarter boom and then Rocket Leauge. ^^; )