RTS System in the Apocalypse

Hans Flemmens woke up in a world like Earth, yet it was not quite the same. The language and the people were of similar figures and structure, but their history differed. He got used to it, graduated, found a job, and began living like any other normal person. Then came a sudden meteor shower, crashing down and spreading a strange virus that turned most of humanity into the walking dead. When Hans opened his eyes again, the world was gone. Countless cities drowned in silence, streets crawling with millions to billions of zombies. Just as he thought it was over, a familiar sound echoed in his head. [ Welcome, Commander. Establishing battlefield control... Stand by. ]