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. Outside of the games, Reptile has appeared in various related media. Reception to the character has been positive, with praise for his evolution from a hidden character to one of the franchise's most recognized fighters. Conception and history Included in the first game late in the development process, Reptile's character concept was conceived while Boon was driving back to work from lunch. Noting the success of utilizing a palette swap method for Scorpion and Sub-Zero's character sprites, he and Tobias decided to include a "super secret hidden feature" in Mortal Kombat, choosing Reptile's green color as a contrast to Scorpion's original yellow and Sub-Zero's blue colors. Developed with the premise of being "a cooler version of Scorpion", the character's concept was completed in a single evening. Reptile's inclusion was intended as a marketing tool for the arcade game: as extreme conditions must be met to encounter Reptile, the designers hoped to rely on word of mouth to spread rumors of the character's existence. He debuted in version 3.0 of the game. Reptile's appearance caused fans to speculate that he could be unlocked and used as a controllable character. Boon noted in a later interview that due to the popularity of the rumors surrounding the character, they decided to include Reptile in subsequent installments of the series as a playable fighter. Design Reptile was originally depicted as a tall, muscular, light-skinned humanoid. Due to his origin as a palette swap of Scorpion and Sub-Zero, his attire was identical to their ninja garb, consisting of pants and boots covering his lower body, along with a black sleeveless shirt and open hood. Green light armor covered his forearms and lower legs, while an open V-shaped green vest protected his torso, extending to a matching small fauld and loincloth. He wears