It's an "experience", rather than a game. You walk around an island, listening to random narrative which triggers at certain spots. From the narration you work out what the story is all about (it's open to interpretation). Obviously, the more you explore the island the more narratives you trigger, and the better you begin to understand just what has happened.
There is a definite conclusion, and a very moving one, if you've listened carefully and drawn all the threads of the story together.
"Bleat, Watson -- unmitigated bleat!" ~ Sherlock Holmes