Originally posted by quanchi112He only failed because of the ultimate plot device in Lui Kang. The guy won every fight in the games except the two on one that led to his death.
Shao Kahn was going to win in a massive all out battle but he failed many times prior to. His history isn't as impressive as Quan Chi's.
Also, Shao Kahn was merging dimensions, and forcibly took souls out of almost every body on Earth except the one's that Raiden protected.