Reverse Rebirth or Riku's Story is a special part of the Chain Of Memories that allows the players for the first time take control of Riku and see his story of Castle Oblivion. In this Version, to play you must finish and complete the first game, Sora's story. There are many different differences to the system in this story. However, during the play you discover that Sora and Riku are completely on the Opposite ends of Castle Oblivion. A New addition is that Riku cannot customize his deck and have as much control over the game, which makes it alot harder gameplay through the game. However, less healing cards were replaced with more attack cards which means less chance of healing yourself during a battle.

Reverse Rebirth Changes
» Card Deck Cannot Be Customized Or Configured.
» Deck Recharge Times Are Eliminated.
» 95% Of Deck is Riku's Soul Eater; 5% is Healing Cards.
» King Mickey is the only Friend available.
» Riku's 'Dark Mode' Can Be Used; Augmented Stats.
» Sleights can only be used in Dark Mode.

Dark Mode
New to The Reverse Rebirth play is Dark Mode, a special number of cards must be lost, or you must take enough damage to activate the Mode, Riku gets new clothing as well as a more power and abilites. Dark Mode is special mode of Riku that allows him to augement abilities and gain extra power. However as good Dark Mode is there are some downsides. When you transfer into Dark Mode you have to use cards from your deck as the cards needed to sacrifice, and with that price reduces your deck.

Sleights
In Reverse Rebirth mode, when using Riku you cannot use sleights normally as used in the original story game, in Reverse Rebrith you can only use sleights while in Dark Mode, and there are only a limited amount of Sleights.