Gantz manga volume 7 contains volumes 19-21 in an omnibus format and features story and art by Hiroya Oku.

After earning enough combat points, the Gantz alien fighters are given three choices: freedom, better weapons, or resurrect a dead Gantz warrior. Each fighter has suffered greatly, and each has experienced devastating loss. But are they willing to further risk their own lives to bring back a fallen friend, and can they bring themselves to abandon the comrades who have bravely fought beside them?

Gantz manga volume 8 contains volumes 22-24 in an omnibus format and features story and art by Hiroya Oku.

The Tokyo Gantz squad of alien fighters join with the battle-hardened Osaka team to face the insanely powerful boss class of offworld horrors. But when facing the beautiful but deadly shape-shifting “100 point” boss, the Gantz warriors soon discover that even the combined firepower of two teams may not be enough to prevail—or survive!

Gantz manga volume 9 contains volumes 25-27 in an omnibus format and features story and art by Hiroya Oku.

It’s good news/bad news for the alien-fighting Gantz warriors. The good news: Kei Kurono is back on the Tokyo team, resurrected after his second death. The bad? A massive unknown flying warship has appeared, laying waste to the planet’s leading military superpower. Gantz teams from all over the world are gathered to fight back, only to be overwhelmed by an endless stream of terrifying foes. Is Armageddon now inevitable?