Not the best way to play a Kingdom Hearts game, but it's got a nice story and it's an interesting crossover.

User Rating: 8.5 | Kingdom Hearts: Chain of Memories GBA
The game play on this one will frustrate, if not drive completely insane, most RPG players. Though if your use to playing card games, you shouldn't have to many problems, at least in terms of setting up the deck. I personally found it difficult at first but got use to it rather quickly. The stacking of decks wasn't anything new to me though using them in active combat was difficult. But if you can get past the first hour or 2, you shouldn't have any problems with using the card system.
The story line is really interesting. It introduced this new set of enemies we had no idea existed but have apparently been around the entire time. And it brings together all the old characters but has a first time interaction as they aren't really there. It also interested me to see how this young girl, Namine, was actually able to manipulate Sora's memories yet we had never actually seen her before.
Then it brought in Riku as he was able to find his way through the darkness to this castle that sits between light and dark. You got to see the other half of the story and a different point of view then what you normally have. Plus, we actually find out what happens to our lost friends in the darkness which hasn't been revealed before now. The game play with Riku is slightly easier since you can't change decks, they are all preset, but that can also frustrate you since you've probably gotten use to using the card combat system and want to customize his deck.