Kingdom Hearts Dream Drop Distance HD is a full HD remaster of Kingdom Hearts 3D: Dream Drop Distance designed for the PlayStation 4. It was released as part of a package of three games entitled Kingdom Hearts HD 2.8 Final Chapter Prologue.
The game is largely the same as its Nintendo 3DS counterpart, but includes some additional features as well as alterations designed to adapt the game to the PS4. The conversion from two screens to one is the most notable of the changes seen. Little has changed in terms of gameplay. However, three new Dream Eaters have been introduced and minor game features have been altered to adapt to the PS4.
Following the destruction of Ansem and Xemnas at the hands of Sora and Riku, Xehanort is revived. In response, Yen Sid puts Sora and Riku through a Mark of Mastery exam in order for them to become full-fledged Keyblade Masters and counter the coming return of Master Xehanort. As part of this trial, the two are separated from each other and sent to worlds previously destroyed by the Heartless that have since been restored, though now in a state of "deep sleep" which disconnects them from the other worlds.
These seven worlds are plagued by Dream Eaters — creatures born from darkness that seek out the sleeping worlds' Keyholes. Sora and Riku's given task is to reawaken the sleeping worlds by unlocking the seven Keyholes they find there and then return to the realm of light, recruiting benevolent "Spirit" Dream Eaters to guide them and battle the malevolent "Nightmare" Dream Eaters, after which they will be deemed Keyblade Masters.
