This is an amazing game, it just made my day. Little amazing things like this game make me so glad I have a ps3. I am actually more excited about this game than I was about COD 5. It is definitely worth the ten bucks and 5 minute download+install. The controls are very simple and provide a fast-paced, over the top, action/ arcade shooter. There are tutorials, but if you read the controls page you won't need them. This game can be very challenging as well as strategic at some points, you have the choice to just completely go nuts and shoot like crazy or you can plan it out by setting bombs and traps to get through the levels that give you too much trouble. I only wish they would have added an online co-op mode, if you want to kill zombie hordes with your buddies then you will have to get them to your house and use the offline co-op. Overall this game is pretty amazing, I am going to be playing this game for a long time.