Shao Kahn
Shao Kahn originated as an unplayable boss character in "MKII". He is fought as a boss (in most cases, the final boss) in most of his appearances, but became a player character for the first time in the home ports of "MK3" as an unlockable character. He would also be playable in the home ports of "Ultimate Mortal Kombat 3", "Mortal Kombat Trilogy", the GameCube and PlayStation Portable versions of "Mortal Kombat: Deception", "Mortal Kombat: Armageddon" and "Mortal Kombat vs. DC Universe". Shao Kahn also appears as a playable character in "Mortal Kombat 11" via DLC. In "Mortal Kombat" (2011), Shao Kahn is once again a non-playable boss. He is also the final boss in the beat 'em up spin-off, "Shaolin Monks".