Kingdom Hearts 2.8 review: A sliver of what you've been waiting for

To say the Kingdom Hearts franchise is difficult for new players would be a similar understatement to saying: 'Aren't people a bit miffed about the EU referendum vote?' We've had: Kingdom Hearts, Kingdom Hearts Chains of Memories, Kingdom Hearts II, Kingdom Hearts Encoded, Kingdom Hearts 358/2 Days, prequel Kingdom Hearts Birth By Sleep, and more. The plot has become nightmarish to follow for anyone but hardcore fans and the series' original hook (a game that appeals to as many people as possible thanks to the inclusion of Disney characters) has been lost. The latest release from Square Enix is the bafflingly named Kingdom Hearts HD 2.8 Final Chapter Prologue. The disc features a high definition remaster of Nintendo 3DS game Kingdom Hearts 3D: Dream Drop Distance, a new installment (deep breath now) Kingdom Hearts 0.2: Birth By Sleep - A Fragmentary Passage, and a cinematic titled Kingdom Hearts χ Back Cover, which details events not shown in the original χ game. So, what story elements do you need to know from the original games?