Darwin's Game(2012)

Darwin's Game

Kaname Sudo’s life changes forever when he accepts an invitation to Darwin’s Game, a mysterious mobile app that thrusts its players into real-life battles using supernatural “Sigils” with terrifying effects. Suddenly hunted by deadly foes, Kaname must outthink and outfight seasoned players as he uncovers the truth behind the game… and the shadowy organization controlling it.

(Source: Titan Manga)