Making his debut in Mortal Kombat 3, Cyrax was one of the three cybernetic ninjas created by the Lin Kuei, in an effort to convert all members into unfeeling, cold-hearted, cybernetic assassins to improve their performance. Of all the three cyborgs, Cyrax appears to be specialized in Hand-to-Hand Combat. He was assigned to hunt down the renegade, former Lin Kuei member Sub-Zero as designated unit LK-4D4. Of the three cyborgs, he has become the first to recover his humanity. This is due to the efforts made by Sonya Blade and Jax Briggs. He has currently allied with them as a token of his appreciation. In the alternate timeline of MK 2011, he was automated and dutifully serves the Lin Kuei, but was visibly opposed to the process before being presumably automated against his will.