Kingdom Hearts can be played online at Most Plays. Kingdom Hearts: Chain of Memories is also available to play at Game Oldies. Both games require an updated version of Flash player to ensure they work properly.
Most Plays' version of Kingdom Hearts is a graphically downscaled copy of the game, but it makes use of the same characters and story. Kingdom Hearts: Chain of Memories is the original Game Boy Advance version and uses the same basic control setup. Kingdom Hearts can also be played online by installing a PlayStation 2 emulator and then downloading a compatible version of the game.