Gantz

Dark Horse's Gantz (2008–2015) collects the visceral, sci-fi horror saga from creator Hiroya Oku, originally serialized in Japan. The series follows a group of people who, after dying, are forced to participate in a deadly game orchestrated by a mysterious black sphere, hunting alien threats with advanced weaponry. Known for its brutally graphic action and philosophical underpinnings, Gantz became a landmark in mature manga, with Oku's distinctive art and storytelling driving the 37-issue run.