Created by Kevan Davis, August 2003
Zombies are grey, move very slowly and change direction randomly and frequently unless they can see something moving in front of them, in which case they start walking towards it. After a while they get bored and wander randomly again.
If a zombie finds a survivor standing directly in front of it, it bites and infects them; the survivor immediately joins the ranks of the undead.
Survivors are pink and run five times as fast as zombies, occasionally changing direction at random. If they see a zombie directly in front of them, they turn around and panic.
Panicked survivors are bright pink and run twice as fast as other survivors. If a survivor sees another panicked survivor, it starts panicking as well. A panicked survivor who has seen nothing to panic about for a while will calm down again.
(You'll need to click on the Java window before it'll accept keypresses.)
And oh, I also wrote Urban Dead.