Demon's Souls is an action role-playing game video game developed primarily by From Software (with assistance from SCE Japan Studio) exclusively for the PlayStation 3. It was released in Japan on February 5, 2009 and published by Sony Computer Entertainment. In North America it was released on October 6, 2009 and published by Atlus while in Europe it was released on June 25, 2010 and published by Namco Bandai Games. Set in a dark fantasy world, players take control of a custom hero who has journeyed to the fictional kingdom of Boletaria, which is being ravaged by an accursed fog that brings forth demons that feast on the souls of mortals. The game has been described as a spiritual successor to the King's Field series, a previous series of games from the same developer. The gameplay involves a character creation system with emphasis on gathering loot through combat with enemies in a non-linear series of varied locations. It also has a unique online multiplayer system integrated into the single-player where players can leave useful messages and warnings for other players' game worlds.
Upon its release in Japan and North America, Demon's Souls was met with a positive response from critics, winning numerous awards. Praised for its dark fantasy art design, variation in combat choice and integrated online multiplayer, the game is particularly notable for its high difficulty level with many critics noting it as a genuine challenge.