Thread:SW8573/@comment-26923519-20170919142727/@comment-3153244-20170919144946

Please direct your future queries to Qwertyxp2000 the second and Spike144 (with reference to this thread if you want to ask them about this). I haven't played BMC for over 2 years now, and my visit to this wiki was only intended to be temporary.

I don't know what these buildings are, nor whether they are significant, but my gut feeling is no, don't bother with these new categories, at least for now.

To answer the first part of your question, there isn't much information on Mud City Wall. That could be because there is a lack of information available in first place, but as I mentioned, I don't play Bloons anymore.