Dark Horse Comics is an American publisher of comic books and manga that was founded in 1986. Dark Horse publishes a number of creator-owned titles such as Sin City, Hellboy, 300, Umbrella Academy , and The Escapist . Dark Horse has also produced licensed comics based on existing media, including Buffy the Vampire Slayer, Aliens, The Thing, Mass Effect, Dragon Age, Planet of the Apes, Avatar: The Last Airbender, and many more. In 1992, Dark Horse Entertainment was formed as the production studio for Dark Horse Comics.