Final Fantasy X[a] is a role-playing video game developed and published by Square as the tenth main entry in the Final Fantasy series. Originally released in 2001 for PlayStation 2, the game was re-released as Final Fantasy X/X-2 HD Remaster for PlayStation 3 and PlayStation Vita in 2013, for PlayStation 4 in 2015, Microsoft Windows in 2016, and for Nintendo Switch and Xbox One in 2019. The game marks the Final Fantasy series transition from entirely pre-rendered backdrops to fully three-dimensional areas (though some areas were still pre-rendered), and is also the first in the series to feature voice acting. Final Fantasy X replaces the Active Time Battle (ATB) system with the "Conditional Turn-Based Battle" (CTB) system, and uses a new leveling system called the "Sphere Grid".
Set in the fantasy world of Spira, a setting influenced by the South Pacific, Thailand and Japan, the game's story revolves around a group of adventurers and their quest to defeat a rampaging monster known as Sin. The player character is Tidus, a star athlete in the fictional sport of blitzball, who finds himself in Spira after Sin destroyed his home city of Zanarkand. Shortly after arriving to Spira, Tidus becomes a guardian to summoner Yuna to destroy Sin upon learning its true identity is that of his missing father, Jecht.
Development of Final Fantasy X began in 1999, with a budget of more than $32.3 million ($52.5 million in 2021 dollars) and a team of more than 100 people. The game was the first in the main series not entirely scored by Nobuo Uematsu; Masashi Hamauzu and Junya Nakano were signed as Uematsu's fellow composers. Final Fantasy X was both a critical and commercial success, shipping over 8.5 million units worldwide on PlayStation 2. It is considered to be one of the greatest video games of all time. On March 13, 2003, it was followed by Final Fantasy X-2, making it the first Final Fantasy game to have a direct game sequel.