It shows that the writers of the show knew what they wanted to do with the whole thing from the get go. Before any of the Flash-Sideways in season 6 began, this game had the first flash sideways moment and it's very interesting to note how the game and Season 6 ends and begins. Also, little things are hinted at throughout the game, like Locke's connection with the Man in Black. If you're a huge fan of Lost like I am you should check this game out. The gameplay isn't stellar and it is pretty short but it is still interesting. Don't spend too much money on it though, I found my copy for 10 bucks at Gamestop and I think that's a good deal for this game if you're a Lost fan. So yeah, Lost fans - if you see this for cheap go check it out!
Also: Can you say "Easy Achievements"?