[Credit to Valve] Its the year 2015,a infective virus only known as the infection has been released over Equestria from a failed science test. The last 8 known survivors,Red Moon,Brosef,Glaze,Apple Jack,Vinyl Scratch,Draco,Sarge,Dr.Whooves,they fight against infected ponies witch they call zombies,among these are zombies with devastating abilities no one knows how they got them.The world they live in is like hell on Equestria.