|This location exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
The Arctic Freedom Fighters took shelter in the Arctic Zone to hide from Dr. Robotnik. They built it by collecting discarded parts that Robotnik tossed aside over time. When it was finished, the Arcitc Freedom Fighters used it to control the enviroment in the cave so they could have the same climate year-round. It is likely that the project was abandoned when the Arctic Freedom Fighters relocated to the Northern Tundra.