The Elder Scrolls IV: Oblivion is an open-world action role-playing video game developed by Bethesda Game Studios, and co-published by Bethesda Softworks and 2K. It is the fourth installment in The Elder Scrolls series, following 2002's The Elder Scrolls III: Morrowind, and was released for Microsoft Windows and Xbox 360 in 2006, followed by PlayStation 3 in 2007. Taking place within the fictional province of Cyrodiil, the game's main story focuses on the player character's efforts to thwart a fanatical cult known as the Mythic Dawn that plans to open portal gates to a demonic realm known as Oblivion.