GameSpot writes: "The demo showcases the first two chapters of the No Mercy episode. The first chapter, Apartments, has you fighting in a rundown building through waves of zombies, as well as bosses, such as the witch, boomer, and tank. In the second chapter, Subway, you work your way through the red line tunnels [insert blood red joke here], man a mounted turret, blast a blitzing horde of infected, and then, finally, enter the third safe house. What immediately stands out about the demo is that you never play the same round twice. Other than the contents of the safe rooms, everything is randomnly generated, including the locations of regular infected, boss infected, and weapons and health pickups".