Despite the fact that not a single Kingdom Hearts title had released on an Xbox platform, the Xbox One version of Kingdom Hearts 3 released day and date with the PS4 one last year. It was a bit odd, but the power of Disney was probably presumed to be more powerful than the need to follow the long-winding and convoluted storyline of Kingdom Hearts. Well, for Xbox players who want to take that leap, they now can.
Together, the games encompass the entire Kingdom Hearts saga. Combined with Kingdom Hearts 3, that means the whole thing is now playable on Xbox One. Of course, we also know more Kingdom Hearts games are in development- two teams, in fact, are dedicated to pumping out new entries, so one can never really be done with this franchise. But you can at least get lost in the weeds of the series if you so desire.