Attack on Titan (進撃の巨人 Shingeki no Kyojin) also known as ''SNK'' , is an anime series based on the manga of the same name written and illustrated by Hajime Isayama.It was produced by Wit Studio and Production I.G for the first three seasons and by MAPPA for the fourth. The first season began airing in Japan on April 7, 2013, on Mainichi Broadcasting System.
Attack on Titan is set in a world where humanity lives inside cities surrounded by enormous Walls that protect them from Titans, gigantic humanoid creatures who devour humans seemingly without reason. The story centers around Eren Jaeger and his childhood friends Mikasa Ackermann and Armin Arlelt whose lives are changed forever after the appearance of a Colossal Titan, which brings about the destruction of their home town and the death of Eren's mother. Vowing revenge and to reclaim the world from the Titans, Eren, Mikasa, and Armin join the Scout Regiment, an elite group of soldiers who fight Titans outside the Walls.