From everything I saw before I bought it, Heaven's Vault seemed to be just another adventure game. Wander some ancient ruins, talk to your professor, hang out in Space Rome, solve a mystery. I like a good adventure game, so I was happy to give it a shot and see what story it wanted to tell me. When I bought it, I never expected it would be my favourite game of this year.
I honestly can't think of a video game that better captures the true spirit of archaeology like this game. I also can't think of one that captures the crushing frustration of doing research, discovering truth, and finding it completely and instantly shut down because it challenges the orthodoxy too much.
It also, like any good dissertation research project, is almost completely non-linear. A few story beats aside, you can do things completely out of order, and you can miss entire segments of the game. My second playthrough was completely different from my first.
They invented an entire language for this game, to the point that there's a section of the Discord--which I'm now on; I've gone that deep--devoted to playing with and exploring the linguistics. People have written poetry in the language, made art in it.
And amongst all that, the story is fantastic. The writing is brilliant. The characters seem real, and the choices you make in your interactions with them actually shape your relationship to them and to the worlds around you.
I thought I'd spend a Saturday afternoon seeing where this went, and instead lost an entire month to it. I even spent hours translating the entire historical book you find. And I think there are still stories I never uncovered, mysteries I never solved.
In a great year of video games, Heaven's Vault is far and away the masterpiece of the year.