While investigating the scene of a gruesome mass murder, Detective Sebastian Castellanos and his partners encounter a mysterious and powerful force. After seeing the slaughter of his fellow officers, Sebastian is ambushed and knocked unconscious. When he awakens, he finds himself in a deranged world where hideous creatures wander among the dead. Facing unimaginable terror, and fighting for survival, Sebastian embarks on a frightening journey to unravel what is behind this evil force.
The Evil Within began development in late 2010 under the codename "Project Zwei". Resident Evil creator Shinji Mikami served as the game's director, with development taking place at his studio Tango Gameworks.The studio was bought by the game's publisher Bethesda Softworks in 2010, shortly after development began.Mikami said that he wanted to make a survival horror game as he believed that contemporary horror games relied more on action than survival. The game was announced in April 2013. Believing that the tropes of the survival horror had become predictable over time, the design deliberately attempts to make the player feel powerless by taking place in confined spaces, limiting ammunition, and presenting near-invincible enemies that promote running and hiding over engaging in combat. Art Director Naoki Katakai said that the design concept of enemies, such as those wrapped in barbed wire or filled with glass shards, is that they are victims suffering under a greater evil. The asylum itself was inspired by the Winchester Mystery House, a Californian mansion famous for its architectural curiosities.
The Evil Within is built on the id Tech 5 modified by Tango Gameworks. On April 15, 2013, and over the next few days, Bethesda Softworks revealed a series of short cryptic videos teasing the new game, officially announcing it on April 19, 2013, revealing the title, the platforms it will be released on, and a live action teaser trailer. Bethesda Softworks announced that the game had gone gold on September 25, 2014