Kingdom Hearts HD 2.5 Remix is an HD remastered collection of three games in Square Enix's Kingdom Hearts series: Kingdom Hearts II, Birth by Sleep and Re:coded. A successor to the series' HD 1.5 Remix collection, it was released for the PlayStation 3 in Japan in October 2014 and internationally two months later.

Kingdom Hearts II is a 2005 action role-playing game developed and published by Square Enix in collaboration with Buena Vista Games for the PlayStation 2 video game console. The game is a sequel to Kingdom Hearts, and like the original game, combines characters and settings from Disney films with those of Square Enix's Final Fantasy series. An expanded re-release of the game featuring new and additional content, Kingdom Hearts II Final Mix, was released exclusively in Japan in March 2007. The Final Mix version of the game was later remastered in high definition and released globally as a part of the Kingdom Hearts HD 2.5 Remix collection for the PlayStation 3, PlayStation 4, Xbox One, Windows, and Nintendo Switch.