Dream Drop Distance (or "3D") is the 6th Kingdom Hearts sequel for the Nintendo 3DS. Its story took place after Kingdom Hearts 2 and Re: Coded. It's also the last bridge towards Kingdom Hearts 3. Unfortunately, I haven't played the game yet, no 3DS, but I have the next good thing. I got this awesome Play Arts Kai figure of Sora as an alternative after failing yet again to search for a Vincent PAK. This version of Sora is from that KH3D game, and thanks to the dude at the store for lowering the price of this figure.
