Return of the Obra Dinn: Amazing mystery/detective game. However once you've played it, you basically can't play it again as you remember the solution already and the challenge of the game is trivialized.
Chants of Sennaar: Really great game about deciphering languages. However, once again, by playing the game once, you'll remember the languages and the game has no challenge any more.
Outer Wilds: Mystery adventure game. There is some replayability as there are perhaps areas that you can still explore, but largely once you figure out the mystery and complete the game, there's not much more to experience. Some people speedrun the game though.

All of the above games I value extremely highly even though I only played them ~8-10 hours.

Do you have any others?

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[–] quantumantics@lemmy.world 6 points 8 months ago (1 children)

While I'm not sure the "walking sim" games are what you're looking for, I'd add Lifeless Planet and maybe Dear Esther. Once you know what's going on/what happened, there's not much point in replaying.

[–] SuperEars@lemmy.world 2 points 8 months ago

I second the Dear Esther mention. I almost feel like it's a dead body starting at me from my Steam library for the past decade+.