On the Pit stage, when strange things are passing over the moon, kill your opponent with Double Flawless and a Fatality.

If the computer defeats you, press F2 when "Finish Him!" appears on-screen. This will activate two-player mode. Choose a fighter and take on Sub-Zero as player two. Win the fight, then let player two's counter go down to zero. You will be returned to the battle you previously lost, but you will not have used any credits!

Press F10 to access the options Screen then hold shift And type DIP then this will activate the dip switches.