If you're looking for anime similar to Attack on Titan Volume 0, you might like these titles.
In a post-apocalyptic world ravaged by earthquakes, grotesque monsters and powerful demons run rampant through the streets of New Tokyo. Only a select few people have been trained in the techniques necessary to defeat these creatures. Brothers Kakugo and Harara Hagakure not only possess the skills, they also harbor the power of the Zero Armor containing the souls of thousands of warriors. Separated from his brother, Kakugo roams the land fighting in order to restore some sort of peace and safety to mankind. However, he finds these monstrosities to be merely pawns to a much larger adversary from his past, who may prove to be his most dangerous opponent of all.
Six months ago, a massive earthquake sunk a massive Japanese city into the ground, burying it from the outside world. The survivors split themselves into three groups: A, with normal salarymen; B, with criminals and lunatics led by the towering Mad Saurus; and C, an all-female group. However, once food supplies began to dwindle the once-kind men of the A group brutally gang-raped the women of the C group, causing the ladies to seal themselves up deep within the ruins. Now, the A group is working towards digging their way to the surface when they unearth Violence Jack, a massive giant. Though the A group wants Jack to help defend them against the B group, he ultimately chooses to protect the C group against all of the others. A bloody civil war approaches - will anyone escape alive?
The battle to retake Wall Maria begins now! With Eren’s new hardening ability, the Scouts are confident they can seal the wall and take back Shiganshina District. If they succeed, Eren can finally unlock the secrets of the basement—and the world. But danger lies in wait as Reiner, Bertholdt, and the Beast Titan have plans of their own. Could this be humanity’s final battle for survival?
In a chaotic time of men eating men, A-e gets some human meat by selling her body…
The globe has been taken over by alien beings who are mad about industrially produced human flesh. An activist group fights for the rights of ‘free-range people' and calls in the media.
High schoolers Kisho Arima and Taishi Fura meet while investigating a ghoul's murder of Fura's friend, then work together as members of the CCG.