You can watch the movie "Gantz" on various streaming platforms, depending on your region. It is often available on services like Amazon Prime Video, Hulu, or Netflix. Additionally, you may find it for rent or purchase on platforms such as Google Play Movies, YouTube, or Vudu. Be sure to check the availability in your specific location, as it can vary. If you prefer physical media, you can also find DVDs or Blu-rays at retailers or online marketplaces.

There are a total of three "Gantz" films. The first two are live-action adaptations: "Gantz" (2011) and "Gantz: Perfect Answer" (2011). These films are based on the popular manga series created by Hiroya Oku. Additionally, there is a CGI animated film titled "Gantz: O," released in 2016, which is set in the same universe but features a different storyline. Together, these films explore themes of life, death, and the struggles of the characters involved in the Gantz game.

As of October 2023, "Gantz: O," the animated film based on the "Gantz" manga series, is available for streaming on Netflix in several regions. However, availability may vary by location, so it's best to check your local Netflix library. The film follows a group of people who are resurrected to participate in deadly missions against alien creatures, featuring stunning animation and intense action.

As of October 2023, "Gantz: Perfect Answer," the sequel to "Gantz," is not available on Netflix in most regions. Availability can vary by location, so it's best to check your local Netflix library. You might also find it on other streaming services or for rental/purchase on platforms like Amazon Prime Video or Google Play.