have only been accessible through very challenging, demanding, and sometimes coincidental requirements. The Sega Mega Drive/Genesis versions contain a unique finisher, named "Fergality". The Sega CD version also contained an additional code (known as the "Dad's Code"), which changed the names of the fighters to that of characters from the classic BBC comedy series Dad's Army. Some Easter eggs originated from in-jokes between members of the development team. One example is "Toasty", which found its way into the game in the form of a small image of sound designer Dan Forden, who would appear in the corner of the screen during gameplay (after performing an uppercut) and yell the phrase "Toasty!", originating from him saying "you're toast". This egg was also the key to unlocking the hidden character Smoke when it happened in the Portal stage in Mortal Kombat II. In Mortal Kombat 4, Forden would say "Toasty! 3D!" after Scorpion did his burn Fatality, a reference to the fact that it is the first 3D game of the series. "Toasty!" is also found in Mortal Kombat: Shaolin Monks, appearing randomly after the character pulls off a chain of hits, though the picture of Forden was removed for that title, but brought back for the 2011 Mortal Kombat game. Yet another private joke was the hidden character Noob Saibot, who has appeared in various versions of the game starting with Mortal Kombat II. The character's name derived from two of the series' creators' surnames, Ed Boon and John Tobias, spelled backwards. In addition, a counter for ERMACS on the game's audits screen (ERMACS being short for error macros), was interpreted by some players as a reference to a hidden character in the original Mortal Kombat. The development team decided to turn the rumor into reality, introducing Ermac in Ultimate Mortal Kombat 3 as an unlockable secret character. The hidden character Mokap, introduced in Mortal Kombat: Deadly Alliance, is a tribute to Carlos Pesina, who played Raiden in MK and MKII and has served as a motion capture actor for subsequent titles in the series. Games Main series The original Mortal Kombat game was released by Midway in arcades during October 1992, and has since been ported to several console and home computer systems, with early ports released by Acclaim Entertainment. The sequel, Mortal Kombat II, was released for arcades in 1993, featuring an increased roster and improved graphics and gameplay,