Square Enix has recently released new screenshots and a trailer for the upcoming Kingdom Hearts HD 1.5 ReMIX that features the other two parts of the collection.
Kingdom Hearts Re: Chain of Memories was originally released for the Gameboy Advance as Chain of Memories, and then later as Re: Chain of Memories for the PlayStation 2. Re: Chain of Memories features additions for the system that the original Chain of Memories didn’t have such as dueling.
Kingdom Hearts 358/2 Days was originally released for the Nintendo DS and has received an HD cutscene treatment. Look forward to being able to experience the storyline of the game later this month!