Starting From Zero in Doomsday

When doomsday arrives, and the world gets dragged into chaos, zombies and monsters start appearing. The Earth gets turned into a game, humans become the lowest in the food pyramid, the prey for all superior beings. After struggling in the doomsday for three years, Kong Zhe returned back to the day doomsday arrived. He discovers that he has his memories of the past, but as time passes by he realizes that he has more cards to play than expected ....How will he survive in doomsday? (Source: AC.QQ, translated)