Raiden is the God of Thunder and Protector of Earthrealm. Ageless and wise beyond measure, he leads Earthrealm's mortals in the endless battle against the forces of darkness. When Shao Kahn, Emperor of Outworld, threatened to merge his realm with Earthrealm, an overwhelmed Raiden implored the Elder Gods to give Earthrealm a fighting chance. Thus the Mortal Kombat tournament was created. For millennia Shao Kahn has been kept at bay, but nine consecutive losses to Goro have eroded hope that Earthrealm can be saved. Determined to prevent Armageddon, Raiden tirelessly quests to find a champion worthy of Mortal Kombat.
Shao Kahn was gone, but the scars of the merging of realms remained.
Remnants of the invasion force roamed freely and had to be dealt with. But Earthrealm is vast and Raiden is but one being. He recruited four warriors, one for each direction of the wind, and divided his soul, placing one part in each of them. Through these new heroes Raiden can kombat the forces of darkness in four places at once.