Homo Ergaster is an extinct species or subspecies of archaic humans who lived in Africa in the Early Pleistocene. Whether H. ergaster constitutes a species of its own or if it should be subsumed into H. Erectus is an ongoing and unresolved dispute within palaeoanthropology.
Thought to have been extinct for 1.4 million years, there are still tribes that remain alive on Primeval Island. In fact, they are also one of the most common Humans on the island, alongside Homo Erectus, Cro-Magnon, and Neanderthal.