A specific scenario in apocalypse fiction involving zombies, lots of 'em.
The first video game about Zombie apocalypse was released in 1986.
The Walking Dead
compare with these groups
|A||1990 - Night of the Living Dead (Movie)|
|B||2002 - Resident Evil (Movie)|
|C||2003 - TWD first issue (Comics)|
|D||2004 - Dawn of the Dead (remake) (Movie)|
|E||2005 - Marvel Zombies (Comics)|
|F||2009 - Zombieland (Movie)|
|G||2010 - TWD first episode (TV series)|
|H||2013 - World War Z (Movie)|