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Over a century ago, mankind was devoured by giant beings of unknown intelligence and origin known as Titans – creatures that eat humans alive indiscriminately and for no apparent reason. The remaining population has managed to survive the last hundred years only by building a multi-walled city capable of keeping the Titans at bay, training military recruits to patrol the perimeter and gather intelligence about their mysterious foe. Eren and Mikasa have lived a relatively peaceful life behind the city's walls, but when a massive Titan appears, smashing the outer barrier and unleashing a wave of terror, their lives are brutally changed forever...
Kei, a cynical and arrogant high school student, has minimal regard for others; so it's much to his surprise that when he's asked by his elementary school friend Kato to save a drunken bum laying on the subway tracks, he actually complies. However, no good deed goes unpunished, and they are swiftly decapitated by the oncoming train. Kei and Kato awaken in a nondescript room occupied by a black sphere and a variety of other people, and thus begins Gantz's game. In it, the players must face off against aliens in battles where death is inevitable and rewards are minimal. Unfortunately for them, this is just the beginning of their nightmare - at least, for those who manage to survive...
Kyojin and Gantz, especially near ch350 of Gantz, revolve around brutally fighting monsters/aliens/giants in order to stay alive and protect humanity. With such a threat, there is need for a special team who can destroy all opposition. When things go array, people get brutally murdered in a sea of limbs and blood. Hope seems lost to the humans portrayed in each manga, and events only get worse as the story goes on. Join the brave who dare read these gory yet intriguing manga.
Both of these manga deal with putting it all on the line to fight for a greater good. Helping friends to survive play a huge role in both. They both have big fighting scenes that go all-out. Death play a role in both of these. If that was an element you like in one, it is similar in the other. Both have elements of mystery. The protagonists in each manga do not know why they fight and later in each manga questions are raised if they are in fact doing the right thing by fighting.
read for your self... What i was going to say has already been said before . Both revolve around survival of humanity, aside from one having more fan service than the other (gantz).
Momiji Rokudou has always been average since he was a boy, from athletics to academics to his short stature. But one thing helps Momiji stand apart – he can see a floating island in the sky. Now that he’s a teen, Momiji has enrolled in Naraka High School, a special facility that only those who see the island can attend. Joined by a new friend named Aika, the two happily begin their high school days – that is, until they discover the terrifying secret of Naraka High and find themselves struggling to survive.
While different in overall plot, both involve a group of people who are brutally devoured by monsters, with similar pacing and terror-filled moments. These are great recommendations for each other.
Both are survival stories with some mystery to them. Aphorism is a little more humorous and the characters feel younger, the story more commercial, but it's still a good category match for Attack on Titan, which feels more epic, desperate, and thought provoking. I found Attack on Titan more original and enthralling, but I enjoyed Aphorism quite a lot as well.
In a land overrun by yoma - monsters that feed upon human innards and take on the appearance and memories of their victims - humans are little more than cattle awaiting slaughter. The only opposition to the yoma is The Organization, a group led by a council of mysterious men who send out their all-female warriors (known as claymores) to do their bidding. However, The Organization is not charitable; a town must pay an exorbitant fee for their services. Likewise, many of the claymores care little for those who they protect. Clare, the lowest ranked claymore, lives only so that she may one day avenge her mentor.
These two titles definetely have the same air about them. They're about humanity in a different reality where there is one clear enemy that needs to be defeated. As you read on, a lot of what you think is true, may not be after all.
In Claymore and in Shingeki no Kyojin there are monsters who kill people, human fused with monsters and the same misterious plot that makes you exited and willing to know how things will be
Both series focus on a dwindling group of "last surviving" humans, who are fighting an overwhelmingly powerful enemy. The enemy in each case is very alien, yet has some mysterious connection to humanity.
Sidonia is placed in a futuristic setting while Shingeki is placed in a more medieval setting, yet everything else about the two series is strikingly similar.
Attack on Titan and Knights of Sidonia are so much alike that it feels like they were adapted from the same source material. The general concepts and plotting and many plot revelations are very similar. However whereas Attack onTitan is a medieval fantasy, Knights of Sidonia is a sci-fi mecha story.
So if you like the basic idea of these shows but prefer to see it told with an emphasis on horror, gore, despair, panic and general chaos, featuring an improvised chaotic approach to defending what is left of humanity and a heavy emphasis on action then Attack on Titan is what you want.
If you want a strong emphasis on setting and a more logical, coordinated, team based approach to the defense of humanity, with more deliberate logical plot revelations and a more focused overall story telling approach then Knights of Sidonia is what you want.
In both stories, a mysterious race of beings has brought humanity to the brink of destruction. However, humanity has managed to get someone with the abilites of the enemy to work for their side.