You can unlock these themes on your PS4 by playing through the Kingdom Hearts HD 1.5+2.5 Remix.
The Wonderful World of Disney has brought along many great characters in the Kingdom Hearts series.
The Outerhaven writes: Kingdom Hearts RE:Chain Of Memories still stands out as one of the best and most unique entries in the Kingdom Hearts saga, setting up all that came after. However, the upgraded version has amplified some things poorly, and thus, it’s not as good as the GBA title you might recall.
While the official soundtracks for Kingdom Hearts III, II.8, Unchained X and Union X are already available on Spotify and Apple Music, the only other Kingdom Hearts music available until today has been cover versions by orchestras or other artists.
Now Disney Music Japan has added the full official soundtracks for the HD 1.5 Remix and HD 2.5 Remix games.
Wasn't this obvious? It was available in the PS3 versions
Cool, good to know. Now, why the hell is this not out for Xbone? Why are they bothering to bring Kingdom Hearts 3 to Xbone if they won't take this opportunity now to let the gamers catch up with the series???