Zombiepocalypse is a GURPS modern game that revolves around an outbreak of zombies all over the world. The game is set in modern-day Las Vegas, and the player characters are regular joes who have made their way to Vegas in some way when the outbreak occurs. Survivors can still be found, but their numbers are dwindling. Meanwhile, the zombies are only growing in number and variety.
The overall game style is somewhat freeform, but ultimately the goal is to escape the confines of Las Vegas and find a place to survive the Zombiepocalypse.