The Apocalypse Needs a Pro

A brief description of the manhwa The Apocalypse Needs a Pro:

“I’m addicted to dopamine.” My life was already driven by chasing excitement, but then the biggest thrill of all happened. I stopped by a convenience store one day… and the cashier shot me in the head. The next thing I knew, I had been thrown into Apocalypse: Safe Zone, an insanely difficult survival game, along with other players. The difference is… I’m the only player who has ever reached the game’s hidden ending. Show more