The Osh-Tekk were a race of tribes-men warriors and hunters who lived in a gold-dominated realm. Subsequently, they were conquered by the Emperor Shao Kahn. Though they were allowed to keep their realm's sacred treasure, the Portal Stone, because of their quick shift of allegiance towards him. A teen Kotal Kahn questions this decision made by his father, Kotal K'etz, who later reveals to him that it was a necessary step in order for him to fulfill the rite of the Realm Walk.
They wield great power over the sun when in sunlight, but are very weak when deprived of it.
Due to the efforts of Reiko and Goro, Kotal Kahn is the last of his kind, as all other surviving Osh-Tekks were wiped out by them.