Kingdom Hearts is a video game series.
is a series of crossover action role-playing games owned by Disney Interactive Studios and developed and published by Square Enix ( originally by Square ) . The series consists of eight games across multiple video game consoles , and future titles are planned . Kingdom Hearts (video game) . Kingdom Hearts is the tenth best-selling PlayStation 2 game of all time , the most commercially successful entry in the series to date , and is considered to be one of the greatest video games of all time . is a fictional character and the protagonist of Square Enix 's Kingdom Hearts video game series .