

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. Developed with the premise of being "a cooler version of Scorpion", the character's concept was completed in a single evening. 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. 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. Originally a palette swap of the franchise's male ninjas, Reptile's design evolved as the series progressed. Reception to the character has been positive, with praise for his evolution from a hidden character to one of the franchise's most iconic fighters. Outside of the games, Reptile has appeared in various related media. 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. As implied by his name, he is a Zaterran, a fictional species of reptilian humanoids. Reptile became playable in the follow-up Mortal Kombat II (1993) and has remained a mainstay of the franchise. He debuted in the original 1992 game as a hidden opponent, establishing him as the first secret character in fighting game history. Reptile is a fictional character in the Mortal Kombat fighting game franchise by Midway Games and NetherRealm Studios.
