Sebastian Castellanos is the protagonist of The Evil Within, a survival horror game released in 2014. A Krimson City detective, he is pulled into a distorted world of monsters, traps and collapsing realities after responding to a mass casualty incident at a mental hospital. The character became closely associated with tense, grounded horror rather than campy scares, and clips featuring him continue to circulate among horror game fans. Editors reuse his voice as shorthand for dread, investigation and survival under pressure.