more than just Minecraft with guns
I think most of the games fun and playability comes from the teamwork needed to survive; building shelter to fend off hoards of zombies and skeletons and mining different ores to build more weapons and equipment to help you in your survival is much easier when you have a mate to watch your back and save you when you need them to. Best of all the game only cost 240 Microsoft points (around $3) which is a great deal for the time I have spent on this game. Also the fact that it is a sandbox game and therefore endless makes the game that much better, you and your friends play to see how far you can get to get bragging rights. Thinking up a new strategy for survival each time you play is great, depending on how creative you are anyways.
Though the game does have room for improvement on the visuals, sounds and a few other small issues the game is more than worth the ticket price. I am glad I purchased the game and I would recommend you do the same thing.