Please note: This code will take you to Blizzard World! Please try the other maps with these codes:
Ecopoint: Antarctica: 9EH20
Hollywood: X46P6
Eichenwalde: QGNNG
Chateau Guillard: XEXGG
Necropolis: 7P2HQ
Kanezaka: 23112
Sources
This post utilizes other codes either in part or in full. This could be because they remixed them, used parts of them, were inspired by them, or other reasons.