Though not as successful as the other Kingdom Hearts games, it received positive reviews and sold well, with particular praise for its graphics, and FMVs, with criticism for the increasingly convoluted nature of the story. The game features a new card-based battle system, in a departure from its predecessor's real time combat system. The game introduces new characters and plotlines that further expand the Kingdom Hearts universe and set up the premise for Kingdom Hearts II. The game follows Sora and friends, as they explore the mysterious Castle Oblivion while battling the sinister Organization XIII, a group of antagonists new to the series. It is a direct sequel to Kingdom Hearts, and its ending is set about a year before Kingdom Hearts II.
Kingdom Hearts: Chain of Memories is the second game in the Kingdom Hearts series. It was one of the first GBA games to incorporate full motion video (FMV). The game serves as an intermediary between the two larger-scale PlayStation 2 games in the Kingdom Hearts series. Kingdom Hearts: Chain of Memories is an action role-playing video game co-developed by Square Enix and Jupiter, and published by Square Enix in collaboration with Disney Interactive in 2004 for the Game Boy Advance.