Mortal Kombat: Defenders of the Realm (known as Mortal Kombat: The of the U.S.) is a cartoon series based on the popular Mortal Kombat video game series. Mortal Kombat X is a fighting video game developed by NetherRealm Studios and published by Warner Bros. Interactive Entertainment. Running on the Unreal. Raiden is a video game character in the Mortal Kombat fighting game series by Midway Games. Making his official debut as one.