Gamer of the Dead G.O.D

Niam Walker is an ordinary kid living a diurnal mundane life. He did not expect to wake up and find himself in an unforeseen circumference: a zombie apocalypse combined with having a supernatural ability called the "Gamer", the ability to turn your reality into a game.
Rather than having the dire rush of saving the world, he is rather enliven to survive the thrilling apocalypse.