For one week each semester, the Claremont Colleges fall victim to a zombie horde in a 24-7 roleplaying game of humans vs. zombies. Marked by bright bandanas on the arm (humans) or the head (zombies), hundreds of students go about their daily routines as if they are in the midst of an infection, safe only in classrooms, bathrooms, and their own dorm rooms. If a zombie tags a human, whose only defense is a Nerf blaster, that human joins the horde. And there's no hiding allowed — each night, plot-driven missions pit the teams against each other to capture territory or score points. Here's what that looks like.