Critics and fans alike praise Gantz: O as a "visual treat" that prioritizes style and action over complex plotting. Gantz: A Series Retrospective
: Players earn points for kills. Reaching 100 points offers three choices: Freedom : Return to normal life with memories wiped. Gantz: O
: Bring back a fallen comrade from Gantz's memory. Upgraded Gear : Trade points for more powerful weaponry. Visual Spectacle and Creature Design Critics and fans alike praise Gantz: O as