This isn't a game. Its an interactive story that allows you to sometimes move around and push buttons from time to time. Not that the story isn't good, it is, I just can't bring myself to really call this a game.
If you're expecting a run-and-gun, don't rent this, save it for someone who wants it. That said, this was probably the best story I've ever seen in a video game. The drama was real and had a sense of urgency, unlike any game (and the walking dead show, for that matter) has offered so far. You may lose sleep over how you could have avoided the horrible things you witness in this game. The only reason I gave this any less than a perfect 10 is because of one instance where I had to reboot because of a crash. other than that, easily the best game I've ever played for story and in the top 3 overall.
I'll close by saying this: Before I played this game I had romantic ideas about a zombie apocalypse; i'd just "hole up somewhere" with my best buds and some weapons and be safe. I don't feel that way anymore.