Board Thread:Questions and Answers/@comment-89.117.51.149-20160608084539/@comment-24436495-20160610091152

Snakehead10 wrote:

The middle area is the key, people can travel through the middle area but you need a guide because paths are very unlikely. All the middle area is connected, there were people who lived in the middle area before zahard but they were not many, i think it is the case i'am not sure either, but the inner tower was locked before the entrance of the first irregular because it is used to test irregulars normaly and now regulars.

The outer tower is where the majority of the tower population live, each floor of the outer tower are not connected to each others but just connected to the middle area who is on the same floor as his. I see.. i didn't thought about the middle area cuz i presumed that is prohibited for non-regulars like the inner area, but you may be right..