Final Fantasy XV is an action role-playing video game developed and published by Square Enix; the game is the fifteenth main installment in the company's Final Fantasy series. It released in 2016 for PlayStation 4 and Xbox One, and was later ported for Microsoft Windows in 2018. The game features an open world environment and action-based battle system, incorporating quick-switching weapons, elemental magic, and other features such as vehicle travel and camping. The base campaign was later expanded with downloadable content (DLC), adding further gameplay options such as additional playable characters and multiplayer. Final Fantasy XV takes place on the fictional world of Eos; aside from the capital of Lucis, all the world is dominated by the empire of Niflheim, who seek control of the magical Crystal protected by Lucis's royal family. On the eve of peace negotiations, Niflheim attacks the capital of Lucis and steals the Crystal. Noctis Lucis Caelum, heir to the Lucian throne, goes on a quest to rescue the Crystal and defeat Niflheim. He later learns his full role as the "True King", destined to use the Crystal's powers to save Eos from plunging into eternal darkness. The game shares a thematic connection with Fabula Nova Crystallis Final Fantasy, a subseries of games linked by a common mythos which includes Final Fantasy XIII and Final Fantasy Type-0. The game's development began in 2006 as a PlayStation 3 spin-off titled Final Fantasy Versus XIII. Tetsuya Nomura served as the original director and character designer. After a development period of six years, it was changed to the next mainline title in the series in 2012; Nomura was replaced as director by Hajime Tabata, and the game shifted to eighth generation platforms. To supplement the game, Square Enix created a multimedia project called the "Final Fantasy XV Universe", which includes an anime series, a feature film and DLC episodes. The game was positively received by critics, with praise given for its gameplay and visuals, while reception towards its story and presentation was mixed. By January 2018, the game had sold over seven million copies worldwide.