故事发生在“GANTZ”的神秘世界，主角则是一名高中生玄野，有一天他在地铁的月台偶然遇见了小学时代的好友加藤胜。当时正义感强烈的加藤打算把摔落轨道上的醉汉抬上月台，因此向在场的玄野寻求协助，遭受意外而双双身亡，但是事情并没有结束，他们在死亡的瞬间被传送到一个神秘封闭的房间，透过房间的窗户还可以看到东京铁塔，但是却无法走出这个房间。在这个房间里，他们看到了许许多多应该死去的人们，有流氓、PLMM、上班族、政治家等等，他们都重获新生了吗?似乎一切并非如此，房间中间有一个黑色的球体，突然亮了起来，发出了指令，奇异的黑球赋予他们新生，但所换取的代价是他们完成杀死怪物的任务，他们就在残酷的杀戮战场中开始了逃杀般的杀戮生活。
杀戮都市 (季节 1)
It's the Beginning of a Brand New Day (集 1) 7.0
编剧: Masashi Sogo
播出日期: 2004-04-13
运行时间: 25 min
概述: After Kei and his childhood friend, Kato, are torn into bloody pieces by a speeding train, they awake in an unfamiliar room, surrounded by strangers. In the middle of the room is a bizarre black sphere: the Gantz.
Episode 2 (集 2) 4.2
编剧: Masashi Sogo
播出日期: 2004-04-20
运行时间: 23 min
OK, Here Are Your Scores (集 3) 8.0
编剧: Masashi Sogo
播出日期: 2004-04-27
运行时间: 25 min
概述: The scores are tallied and Nishi explains some of what he knows about the rules of the strange world of the Gantz. The unusual situation grows even odder the next day when Kei wakes—and finds that this nightmare is no dream.
That Means at the Time... (集 4) 7.5
编剧: Masashi Sogo
播出日期: 2004-05-04
运行时间: 25 min
概述: Seemingly back among the living, Kato must protect his brother from their hateful aunt. Meanwhile, Kei’s special suit gives him an advantage against the bullies at school. But will it help him when Kishimoto appears at his door?
All Right! (集 5) 7.5
编剧: Masashi Sogo
播出日期: 2004-05-11
运行时间: 25 min
概述: Despite his best efforts, Kei remains unsatisfied during Kishimoto’s overnight stay at his apartment. At the place Kato calls home, more ugly evidence of abuse piles up.
We're After You (集 6) 6.0
编剧: Masashi Sogo
播出日期: 2004-05-18
运行时间: 25 min
概述: Kato’s patience is being tested. At home, the abuse dished out by his aunt pushes him to the breaking point. Meanwhile, at school, a group of bullies forces him to take decisive and drastic action.
Uh-oh! (集 7) 8.0
编剧: Masashi Sogo
播出日期: 2004-05-25
运行时间: 25 min
概述: A new round begins for the gang. Appearing before the Gantz, they find themselves joined by a diverse group of fresh players. As the game gets underway, Kei panics when he realizes his suit is nowhere to be found.
I'll Kill You Without a Moment's Hesitation (集 8) 6.0
播出日期: 2004-06-01
运行时间: 25 min
概述: As the group prepares to track down the Suzuki alien, Tetsu’s gang is creating conflict and Nishi’s smart mouth isn’t helping the situation. When tensions boil over, blood is spilled before the hunt even begins.
He Can't Shoot (集 9) 7.5
播出日期: 2004-06-08
运行时间: 25 min
概述: Kato is forced to take action to save Nishi from certain death, but he may not be ruthless enough to kill the Suzuki alien. Time is running out for yet another player trapped in the cruel world of the Gantz.
Kato, You Wait Here (集 10) 8.7
播出日期: 2004-06-15
运行时间: 25 min
概述: The group is beginning to figure out the rules of the twisted game in which they are caught, but survival is still far from guaranteed as the battle with the remaining Suzuki aliens erupts.
Please Die (集 11) 8.0
编剧: Masashi Sogo
播出日期: 2004-06-22
运行时间: 25 min
概述: Kei, suitless and outnumbered by the Suzuki aliens, must face the biggest monster alone. When the battle ends and the scores are tallied, the group sees that there might be a way to escape their strange fate.
