Such an amazing experience, journey and narrative, a genuine one-of-a-kind that only the video game medium could produce. A game you can only really play "properly" once, figuring out both the story and your role in it, being the rogue-like element of the game, so once you "beat" it, you've finished the book, ended the film, so on and so forth.
Sad, but completely worth playing none-the-less, one of those times you wish you could just forget and go back in blind for the first time again. If any game truly deserves to be preserved by GoG, it's gotta be this one. It's a game everyone should have the right to play at some point in their life.