It is one of my all-time favorite games. I have unfortunately played it to death; I've run out of stupid challenge runs. The game has a story and uniquely for survival games it has an ending, there's a Win The Game button. But the game is as much about the story you're going to create; the way you choose to go about things, the order you decide to explore in, the happenstances of your adventure are maybe more important than what the wiki says the story is. Savor that.

I will offer this hint. I don't think it's a spoiler; I think there is a strong possibility this hint will prevent you from alt-tabbing out to look up the wiki and accidentally encounter a spoiler. But I will tag it as a spoiler anyway.