The Hanoi Project (ハノイプロジェクト Hanoi Purojekuto), also known as the Lost Incident (ロスト
10 years before the present, six children were kidnapped by a certain organization and went missing one-by-one. During those six months of captivity, the children were imprisoned separately in rooms with nothing but a VR equipment. They were forced to Duel in a virtual arena where if they did not win, they were electrocuted and starved. After the children were rescued, the incident was covered up.
In the aftermath of the incident, several of the children suffered from post-traumatic stress disorder, with some taking years of therapy to recover, while others have not recovered at all. As the person to whom the mysterious voice belonged to was not amongst the rescued, Yusaku believes they may still be captured.
The project's name is the main reason why Yusaku and Kolter suspect the Knights of Hanoi of a major involvement in the incident and thus why they pursue them. Varis confirmed his knowledge of the incident during his Duel with Yusaku while Kiyoshi, Kyoko Taki and Faust were all present during the incident, watching the victims' suffering.
- White room.png
The appearance of the white room
- Number on the wall before.png
The 8-digit number (99999999) shown on the wall at the start of the incident
- Number on the wall during.png
The 8-digit number (68821000) shown on the wall sometime during the incident
- Food reward 1.png
The reward for winning a Duel
- Food reward 2.png
The penalty for losing a Duel
- Electrocution Penalty.png
Yusaku being electrocuted for losing a Duel
- White room true.png
The true appearance of the white room
- White room door.png
The door leading into the white room