GANTZ:O is an anime film that premiered in fall 2016, produced by Digital Frontier.

About the production: the story comes from a manga, the film runs about 96 minutes and its current status is "finished".

Its main genres are action, drama, ecchi, horror, psychological, sci-fi and supernatural, with themes such as Survival, Full CGI, Aliens and Death Game.

On AniList, GANTZ:O has an average score of 71%, a good score, and appears on 23,752 users' lists.

Death does not have to be the end; one can live again, but only through beating the game posed by the black ball called Gantz. On his way home to celebrate his younger brother's birthday, brave and kind-hearted student named Masaru Katou is stabbed to death. He awakes in a small room with a cityscape view in the heart of Tokyo—and he is not alone. To his surprise, it is not the afterlife, but the waiting room for a high stakes game with their lives on the line. Before he has the chance to process the situation, Masaru is handed a gun and teleported into the center of Osaka to carry out one simple task: eliminate any alien on sight. Accompanied by the aged Yoshikazu Suzuki, the stunning idol Reika Shimohira, and the cold but experienced Jouichirou Nishi, Masaru must overcome his fears in order to survive the game and return home to his waiting brother. (Source: MAL Rewrite) Note: A full 3DCG movie adaptation of the manga's Osaka arc.

Official synopsis from AniList.