Erika Multinational Headquarters

From TCWiki

EM's headquarters is located at the outskirts of the city of Megatokyo (so it is apart from where most of the other factions are located).

EM campus is composed of multiple buildings for laboratories, various testing facilities, and even apartments for their employees. It also features an artificial, hollowed-out volcano (where some of the more specialized testing and research facilities for their weapons projects are located).