Development on the game began in early 2006[1] and the game was announced in May of the same year,[2] with gameplay demonstrated at E3 2006.[3] After over a year and a half of development,[1] its release in 2007 was met with generally favourable reviews,[4][5] and helped boost overall sales for Codemasters that year.[6] An expansion pack entitled Overlord: Raising Hell was released in February 2008, along with additional multiplayer maps and a local split-screen co-op mode.[7] A PlayStation 3 version of the game, entitled Overlord: Raising Hell, was released in June 2008, which included both the original game and its downloadable content. A sequel, Overlord II, was released in June 2009, followed by a spinoff for the Wii, entitled Overlord: Dark Legend, and a Nintendo DS game called Overlord: Minions.