Destroy all the zombies with the help of balloons, knives and grenades! A knife will instantly kill a zombie or person it hits, make sure not to harm innocent people. A balloon inflate as soon as it hit zombies or wooden objects, and will cause them to float. A grenade can bounce off objects and stick to zombies, so it's a good option, but it can also kill you, so be careful when using the grenades!
Use your mouse to aim and shoot.