Which Kingdom Hearts compilation includes Dream Drop Distance HD and 0.2 Birth by Sleep?

The Kingdom Hearts compilation that includes Dream Drop Distance HD and 0.2 Birth by Sleep is Kingdom Hearts HD 2.8 Final Chapter Prologue.

Released in Japan on January 12, 2017, and worldwide on January 24, 2017, the collection was designed as a bridge toward Kingdom Hearts III. Its main playable component is Kingdom Hearts 3D: Dream Drop Distance HD, an adaptation of the Nintendo 3DS adventure starring Sora and Riku.

The compilation also contains Kingdom Hearts 0.2: Birth by Sleep – A Fragmentary Passage, a short original episode following Aqua in the Realm of Darkness, plus Kingdom Hearts χ Back Cover, a cinematic prequel about the Foretellers. The “2.8” title reflects Nomura’s numbering concept: Dream Drop Distance follows the 2.5-era games, while Birth by Sleep-related material contributes the decimal progression.

A common mix-up is The Story So Far, which bundles several Kingdom Hearts collections, including 2.8, but is not the compilation specifically identified by these two contents.