World of Memories

The World of Memories is a reality in the Yu-Gi-Oh! manga and anime. It was a world existing within the Millennium Puzzle, which reconstructed the moments in the lives of Pharaoh Atem and Zorc Necrophades, before their souls were sealed within the Millennium Puzzle.

The world was used as the setting for the Shadow RPG.

Nature
The World of Memories exists inside the Millennium Puzzle. It can be accessed through Yami Yugi's soul room via a particular door.

The world is built from the memories of Atem and Zorc. Atem could exist in the world up until the point where his memories ended.

People could exist in the world for different reasons: Ryo Bakura constructed a tabletop diorama of the ancient Egyptian city where the world is set. Yami Bakura and Yami Yugi used this as their game board when they played the Shadow RPG. Events conducted at the table could directly affect the World of Memories.
 * Individuals existing within the world would behave as they did in the original course of events, unless influenced by people from the real world.
 * Individuals from the real world could be transported here to relive their past, but were capable of doing things differently.
 * Individuals who had not originally existed in these moments of Atem and Zorc's lives could also have their consciousness transported to the World of Memories. However they would be invisible to the world's indigenous people and were capable of performing superhuman feats such as flight, intangibility, limited matter creation and the ability to summon monsters using Duel Monsters cards. Some of these powers could be restricted when the will of Atem was strong enough.

Events
When Yami Yugi completed all his tasks and presented the Egyptian Gods to the Tablet of Lost Memories, his soul got transported to a table playing the Shadow RPG against Yami Bakura, while simultaneously entered the World of Memory, entered the body of his past self, and relived through the events that happened 3,000 years ago. In the anime, Yami Bakura also entered the Memory World, and entered the body of his past self to regain his memories as the Thief King and fight against Pharaoh Atem, while yet simultaneously playing the Shadow RPG with Yami Yugi. Yugi, his friends, and Shadi (Bobasa in the manga) entered the Puzzle in an attempt to find the "true door" and enter the World of Memory. In the manga, a shadow of Dark Bakura spied on Yugi and his friends. Yugi eventually entered the World of Memory, and in the manga, Dark Bakura secretly followed them inside, whereas the full Dark Bakura played the Shadow RPG against Dark Yugi. Bakura's goal was too return Zorc Necrophades from the Millennium Puzzle, and Yami Yugi's goal was to defeat Bakura and keep his friends safe. Bakura was eventually successful in Zorc's resurrection. However, Yami relearned his true name, and defeated Zorc, which killed Zorc and Yami Bakura. Yami Yugi later left the Memory World.