Left 4 Dead is a co-op game in the truest sense of the word. It doesn't just ask players to co-op for the fun of it like most co-op gaming experiences (take the grand daddy co-op game Diablo for example), it requires you to cooperate or be zombie food. Sure there is a single player experience to be had, but it's just the co-op game using bots to replace your human compatriots. And while these bots are mostly effective they don't have the ability to truly cooperate with you. The point? Don't even think about getting this game to play by yourself. However, if you are a co-op gamer, and I hazard to guess many on this site are, you'll be hard pressed to find a more fun 4-way co-operative experience vs. the computer than this. This game just doesn't challenge your teamwork skill, it also serves up a barrel of fun by making you and your party feel as if you are in a cheesy zombie movie with barely any hope of survival. But it's not all glum. This game makes use of the word party to it's more common definition to mean a gathering of people for a good time. You will have a great time running and gunning with your friends. Hearing your friends screaming for help as zombies try to drag them off is great entertainment, and they'll get their fair share from you. Count on it. Some people have complained about how shallow this game is, and it's true, but you must understand the context. This game isn't meant to be a great single player experience like Half-Life. If you want that there are loads of games crowding the market. Left 4 Dead simply focuses on the replayability of multiple campaigns (that never play the same way twice!) each of which are meant to represent a zombie flick and take about that long to play. This game is available on XBox 360 and PC. FPS fans needn't worry about playing on the 360 as the analog stick controls have been nailed perfectly. It's not hard at all to play without the mouse and keyboard. I myself picked the 360 version because I like having LIVE and with it the knowledge that everyone has a mic (something fundamentally needed for online play with this game). This game requires you to have friends and a love for co-op. If you don't, you probably will be one of the haters bashing it for how shallow the game is, but if you do, you are in for something special! P.S. If you are a fun, social co-op player who needs a 4th survivor for your party, hit me up on Live!