Starting out the list is a fan favorite.
Gantz tells the story of two high school students who die after rescuing a beggar from a train. In place of going to heaven or hell, they land in an apartment with a black sphere at its center. Rather than continuing with their normal lives, the sphere – GANTZ – forces them to play an alien-hunting “game” of unprecedented danger and horror.Gantz
One of the most controversial entries in this list is the ’90s mecha horror anime Genocyber Despite the fact that gore anime was very popular during the ’80s and ’90s, Genocyber did something that many might consider taboo. While many people would frown upon children getting killed on screen, Genocyber ignored this and featured some kids getting blown up. Spread across five episodes, the original video animation follows a new weapon that sets out to destroy anything and anyone.