Zombie Apocalypse

In the year of 20xx, a virus outbreak had spread around the world, transforming the infected human host into a cannibalistic monster, eventually almost wipe out the entire population of human race. The survivals now can only live in a quarantine fortresses.

Years passed, the survivals had built up a largest, safest quarantine fortress in the country, know as Olympus. Refugees would travel across the zombie wasteland to enter the sanctuary, only realize it is a place ruled by a cruel dictator.