Mortal Kombat is all about the eternal war between the Earthrealm, where you and everybody you know lives, and Outworld, a shadowy hellhole filled with demonic marauders who like to organize tournaments and perform fatalities, usually in that order. The leader of those cross-dimensional jerks for most of the series was a dude named Shao Kahn, who was responsible for many of the failed invasions throughout the franchise's timeline. Initially hiding behind his underling, Shang Tsung, Kahn became playable in Mortal Kombat II, where his sprite was digitally resized to make him tower over the other characters. Like many end bosses, he's got a number of cheap attacks under his belt, but our favorite thing about Shao Kahn is that his speaking voice is the voice of the announcer heard throughout the series – so when you hear "Finish Him," that's Shao Kahn talking, baby. You'd better do what he says... or else. On top of that, if he beats you without losing health, he will stand over your mangled corpse and say "Flawless Victory!" What a badass!
