Doomsday: PUBG System

*As a jobless person, except eating or sleeping all he is doing is to play PUBG game.
he never thought that he would be struck by lightning one day.When he woke up, he discovered that there was PUBG system in his head, and this damned world had reached the brink of collapse.
The zombies ran rampant, and the humans fell from the altar like ants. 
The monsters became the masters of this world.
what is he going to do ?