Gantz (2004)7.1 /10

Storyline:  Kei Kurono dies saving a man on the train tracks, only to awaken with other deceased strangers in a room containing a black sphere called Gantz. Armed with unfamiliar weapons and suits, they are ordered to hunt an alien. Teaming with Masaru Katou and a young woman, Kei enters a perilous new reality where survival is uncertain.