How do you unlock the Spirit World in Yu-Gi-Oh 5D's Over the Nexus?

Answer 1

The Spirit World can only be unlocked after you defeat Team New World in the Story Mode. There are three computers containing duelists that you must defeat consecutively and without any breaks. In order to start each individual challenge, you must talk to the person standing next to the computer.

The locations of the computers are at the Stadium in the room to your right upon entering, Team 5D's garage at the Fountain Plaza, and the fake Duel Runner shop in the Satellite. First, you must talk to Lester, Bruno, and Kuroe respectively so you can start to challenge when you select their respective computers. After defeating all the duelists in one computer, you must talk to the person standing next to it.

After clearing all three consecutive duels, head to the Fountain Plaza and you should be able to go through the door on the left. This will lead you to maze you must get through once to reach the Spirit World.