Attack on Titan: Lost Girls

OVA 1: An old journal is found by Levi and Erwin when they conduct the surveillance operation outside the wall. The contents of "Ilse's Journal" result in some unexpected actions from Hange. OVA 2: Another story of the 104th Trainee Squad. OVA 3: Will depict a "memorable episode before the 104th Training Corps became unified." (Source: Anime News Network)

This prequel to megahit Attack on Titan answers the questions: How did Captain Levi of the Survey Corps go from street thug to humanity's strongest soldier? And how did Commander Erwin become a cold, calculating leader, ready to sacrifice anything to save the human race? The fires that forged this bond of loyalty and trust were intense indeed! (Source: Anime News Network, revised)

It’s been four years since the Scout Regiment reached the shoreline, and the world looks different now. Things are heating up as the fate of the Scout Regiment—and the people of Paradis—are determined at last. However, Eren is missing. Will he reappear before age-old tensions between Marleyans and Eldians result in the war of all wars? (Source: Crunchyroll)

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? (Source: Funimation)

Eren Jaeger swore to wipe out every last Titan, but in a battle for his life he wound up becoming the thing he hates most. With his new powers, he fights for humanity's freedom facing the monsters that threaten his home. After a bittersweet victory against the Female Titan, Eren finds no time to rest—a horde of Titans is approaching Wall Rose and the battle for humanity continues! (Source: Funimation)

The war for Paradis zeroes in on Shiganshina just as Jaegerists have seized control. After taking a huge blow from a surprise attack led by Eren, Marley swiftly acts to return the favor. With Zeke’s true plan revealed and a military forced under new rule, this battle might be fought on two fronts. Does Eren intend on fulfilling his half-brother’s wishes or does he have a plan of his own? (Source: Funimation)

Several hundred years ago, humans were nearly exterminated by titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest of titans. Flash forward to the present and the city has not seen a titan in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as the city walls are destroyed by a colossal titan that appears out of thin air. As the smaller titans flood the city, the two kids watch in horror as their mother is eaten alive. Eren vows that he will murder every single titan and take revenge

Movie compiling the first 3 seasons of Shingeki no Kyojin.