Mountain, a polluted world under the dominion of the Land & Sky Corporation, existed within the Aakaash system as a planet. It was known for its hazardous conditions, displaying elevated levels of lethal toxins and Radiation in numerous regions. Its environment was characterized by instability, with frequent natural disasters caused by extreme weather, and it served as habitat to aggressive wildlife.
The name Mountain was originally 艮 (gen in Pinyin) in Chinese, signifying "mountain" or "stillness," and it relates to the ☶ trigram of the I Ching.