Btooom!

Story:

Ryouta Sakamoto, a top-ranked player of the online battle game BTOOOM!, wakes one evening to find himself hanging from a tree with a parachute. Before he can orient himself to his unfamiliar surroundings, he is attacked. As a barrage of explosives rain down on him, he realizes that he too has a pack of bombs—bombs identical to those used in BTOOOM! Having mastered the game, can he come out on top in this real-life game of survival?