All players begin as humans and wear a bandana on their arm. A player is chosen by the moderators to be the original zombie (OZ). Zombies usually move their arm bands to their heads, to show that they've turned, but depending on the game, the OZ can stay anonymous for a day, or until a certain killcount.
The OZ tags as many humans as possible, turning them into zombies. Each zombie must tag a human every 2 days, or the zombie starves, and is out.
Mods monitor zombie kills and human transformations using an online program. All players are given an alphanumerical code before gameplay begins. When a zombie tags a human, the human must give the zombie their code. The zombie enters the code into the computer program. This process monitors the times that a zombie has fed, as well as what humans have been eaten.
Humans defend themselves from zombies by shooting nerf guns or throwing socks. If hit, the zombie is stunned for 15 min.
Safe zones are areas where zombies can't attack humans. Depending on the game, offcampus areas can also be considered safe zones.
Missions are created by mods to keep humans from hiding all game.
Guy 2: Don't you know, man? There's a humans vs zombies game this week. The zombie apocalypse is upon us!
Guy 1: Aww man, I missed the sign up. Gonna need to do that next time, by going to www.humansvszombies.org.