Zaterra is a forgotten realm in the Mortal Kombat video game series.
Zaterra was home to Reptile's race of Saurians who originated from Earthrealm long before it was annexed by Outworld through ten consecutive victories in Mortal Kombat. It used to be ruled by a matriarch. Her influence on the other members of the Saurian race is so strong that over time, they begin to revert back to a more primitive consciousness, the longer they are separated from her presence, which also affects their ability to maintain a humanoid appearance. In Mortal Kombat: Conquest, however, a former soldier of Reptile says that Zaterra wasn't destroyed because Shao Kahn came to the realization that the Saurians would make wonderful allies in his plans.
Ruins of ZaterraAncient ruins of the lost realm of Zaterra in Mortal Kombat: Conquest.
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In the television series Mortal Kombat: Conquest, Zaterra is depicted as very rainy; thunder can be heard along with the drenching rain, and many transparent Saurians crawl along the limbs of the trees, broken statues and ancient ruins within that realm.
It is unclear when Zaterra was conquered by Outworld, but Nitara's vampire people kept records of their existence before they were annexed by Outworld as well. The known Saurians also seem to retain no memories of their home world, which suggests that the conquest of Zaterra happened in a distant past. Though the Saurian people inhabited the realm prior to being conquered, their first home was Earthrealm which they were forced to leave during the catastrophic battles between Shinnok and Raiden.