Final Fantasy X​ (ファイナルファンタジーX Fainaru Fantajī Ten?) is a console role-playing game developed and published by Square (now Square Enix) as the tenth title in the Final Fantasy series. It was released in 2001 for Sony's PlayStation 2. The game marks the Final Fantasy series' transition from entirely pre-rendered backdrops to fully three-dimensional areas, and is also the first in the series to feature voice acting. Final Fantasy X replaces the Active Time Battle (ATB) system with a new Conditional Turn-Based Battle (CTB) system, and uses a new leveling system called the "Sphere Grid".

Set in the fantasy world of Spira, the game's story centers around a group of adventurers and their quest to defeat a rampaging monster known as "Sin". The player character is Tidus, a blitzball star who finds himself in Spira after his home city of Zanarkand is destroyed by Sin. During the game, Tidus, along with several others, aids the summoner Yuna on her pilgrimage to destroy Sin.

Development of Final Fantasy X began in 1999, with a budget of more than US$32.3 million 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. It was voted by the readers of the Japanese video game magazine Famitsu to be the greatest video game of all-time. As of January 2004, the game has sold 6.6 million units worldwide. In 2003, it was followed by Final Fantasy X-2, making it the first Final Fantasy game to have a direct sequel.