Your bunker is constantly being attacked by zombies and huge mutant creatures, and your purpose is to protect it. All of this is on a heat sensor so it's all in black and white. You use three different weapons, a minigun, missles, and bombs, to stop them from reaching your bunker, while at the same time protecting those civilians that are approaching it. When you hit a zombie, they blast to pieces and disapear, if you hit a citizen, you get a penalty, if you hit three civilians, your pulled out and the game ends. There's no blood or gore however since it's top view down, and It is all on a heat sensor so it should be ok for 11 and up.