This is a list of playable and boss characters from the Mortal Kombat fighting game franchise and the games in which they appear. Created by Ed Boon and John Tobias, the series depicts conflicts between various realms. Most characters fight on behalf of their realm, with the primary heroes defending Earthrealm against conquering villains from Outworld and the Netherrealm. Early installments feature the characters participating in the eponymous Mortal Kombat tournament to decide their realm's fate. In later installments, Earthrealm is often invaded by force.