quest to find why his people are out of favor with Poseidon. Microsoft published the game on October 30, 2002, and its expansion, The Titans, on October 21, 2003. The Titans featured the Atlanteans as a new civilization. Its campaign is shorter than previous expansions, and centers on Kastor, son of Arkantos, who falls for the lies of the titans and frees them from Tartarus. Age of Mythology sold more than one million units in four months. It scored 89% on Game Rankings and Metacritic. The Titans failed to equal the sales success of Age of Mythology, although critics rated it highly. Backbone Entertainment developed Age of Empires: The Age of Kings as a turn-based game for the Nintendo DS. Majesco Entertainment published the game on February 14, 2006. It is similar to other turn-based games, such as Advance Wars, but with a gameplay based on its PC counterpart. Age of Empires: The Age of Kings scored 80% on Game Rankings and Metacritic. Konami brought a game of the same title to the PlayStation 2 around five years earlier than the DS version, but the game had little promotion, and sold poorly. On August 16, 2010, Microsoft announced Age of Empires Online, which was a free-to-play Games for Windows Live online game, it developed in collaboration with Robot Entertainment. It featured Free-to-play experiences via Games for Windows LIVE as well as: A persistent online capital city that lives and grows even when you're offline, Cooperative multiplayer quests, trading and a level-based system that lets you progress at your own pace. Premium content could be earned or purchased, such as access to blueprints and special items, as well as more quests and features. In September 2013, it was announced that the game would remain functional until July 1, 2014, after which it would be shut down due to the content being too expensive to maintain. On April 13, 2014, Age of Empires: World Domination was announced. It was developed by KLab Games for the iOS, Android and Windows Phone. It was released on December 7, 2015, with the service terminated on November 30, 2016. On August 25, 2014, Age of Empires: Castle Siege was announced. It is a touch-based game developed by Smoking Gun Interactive. It was released on September 17, 2014, for the Windows PC and Windows Phone 8. Development Historical elements The development phases of the Age of Empires