It has come to my attention that the last reviewer for this Anime series must have been someone between the ages of 12 and 14, still stuck on the "DragonballZ fight, fight fight!" mentality and simply ignored the bigger picture. While this show has it's fair share of action, the show focuses on the inner livings of diverse human types being put through varying dangerous situations. The show presents humanity for what it (in the mind of the creator, that is), a huge group of cowards, glory seekers, murderers and all together selfish people. Among them are thrown a few gems, innocent bystanders (children and the elderly) and people that follow a humane moral code; of course, their only role is to provide hope to the viewer, to show that humanity does have it's good sides, however insignificant.
I am left with the impression that Gantz is in itself, purgatory. Passing judgment on the humans he "saves" from absolute death by forcing them to go through a series of trials. Those worthy, the ones that "survive" the trials, regardless of past crimes, will be rewarded, and those that fail will continue their lifeline by resuming their deaths.
