Gantz is a brutal sci-fi action seinen manga following Kei Kurono and ordinary people who die and are forced into a deadly survival game controlled by a mysterious black sphere called Gantz. Revived after death, players must hunt grotesque aliens in urban Japan using advanced weapons and suits, earning points to survive, revive others, or escape the game. Graphic violence, sexual themes, moral ambiguity and existential dread define the series as it explores human nature, fear, selfishness and the value of life under extreme pressure. Known for its shocking twists, cinematic battles, psychological tension and relentless escalation, Gantz attracts readers searching for dark sci-fi manga, survival game stories, alien invasion action, ultra-violent seinen, death game narratives and controversial mature themes. Perfect for fans of Inuyashiki, Battle Royale, Ajin and Blame! who enjoy high-stakes combat, brutal realism and thought-provoking chaos. 🔎 Keywords: Gantz manga, sci fi survival game, death game seinen, alien hunting manga, ultra violent manga, psychological action thriller, mature sci fi story, Hiroya Oku manga. Meta Description: Gantz is a dark sci-fi action manga where resurrected humans are forced into a deadly alien-hunting game, blending extreme violence, survival horror and existential themes. Alternate Titles: Gantz Manga / ガンツ / GANTZ Hiroya Oku / Gantz manga english