Technical Specs. When they become adults, Kuai Liang threatens Hanzo and his family while out for a walk and Hanzo is forced to kill Kuai Liang. While Sub-Zero appears as a playable character in his human form, his cybernetic form is reused as a hidden variation for the DLC character Triborg. After the tyrannical Superman is accidentally freed from the Phantom Zone however, a duty-bound Sub-Zero chooses to stay for as long as he needs to so he can assist the Justice League in re-imprisoning him. May 5, In Mortal Kombat: Shaolin Monks , which takes place during the events of Mortal Kombat II , Sub-Zero first appears as a boss character , but then allies with the protagonists Liu Kang and Kung Lao for a short time during the search for his older brother. Sub-Zero holds the distinction of being the only character ever introduced in the entire history of the franchise to be playable in every single iteration of the primary fighting game series. The younger Sub-Zero made an appearance in Mortal Kombat: Annihilation , where he was portrayed by Keith Cooke , who had played Reptile in the first movie.