The Slaughtering Grounds delivers constant intense interaction within its environment. Zombie hordes plague the scenarios and random events are happening all the time. These random events include airplane cargo drops, frenzy zombie phases, boss spawns and more! Choose to play single player or in 64 player arena FFA's. Purchase new characters or upgrade your existing characters health, armor, regeneration and guns reload rate, damage, ammo pickup size(15 upgrades per character and gun!)