Reptile is a fictional character in the Mortal Kombat fighting game franchise by Midway Games and NetherRealm Studios. He debuted in the original 1992 game as a hidden opponent, establishing him as the first secret character in fighting game history. Reptile became playable in the follow-up Mortal Kombat II (1993) and has remained a mainstay of the franchise. As implied by his name, he is a Zaterran Saurian, a fictional species of reptilian humanoids. One of the last remaining members of his race, he aligns himself with the series' primary villains in the hope that his service will lead to the Zaterrans' revival.