Kingdom Hearts Birth by Sleep

Release dates and platforms
PlatformRelease datesCompilation
PlayStation Portable January 9, 2010 September 10, 2010 September 7, 2010 -
PlayStation 3 October 2, 2014 December 5, 2014 December 2, 2014 Kingdom Hearts HD II.5 ReMIX
PlayStation 4 March 9, 2017 March 31, 2017 March 28, 2017 Kingdom Hearts HD I.5 + II.5 ReMIX


Birth by Sleep has been released after Kingdom Hearts II, but its events happend ten years before, and after the Keyblade War mentioned in Back Cover and Union χ.


Kingdom Hearts Birth by Sleep focuses on three friends, Terra, Ventus and Aqua. They all share the same dream of becoming Keyblade Masters. Soon, Terra and Aqua will be tested in the Mark of Mastery exam to determine which of them, if any, will become a Master.

Strange monsters are threatening the worlds and Master Eraqus sends Terra and Aqua on a mission to get rid of them. Ventus, worried about Terra, follows him without permission in an attempt to catch up to him.