Blinking eyes - Once you get to Goro and Shang Tsung, you should be on the skull level. If you go all the way to the left you will see some eyes blinking. They are three fighters in that black shadow. The first is Reptile, the second is Ermac, and the third is Smoke.

Fight Against CPU Reptile - Defeat your opponent with a double-flawless victory match and a fatality in The Pit stage, after
the shadows pass over the moon.

Fight against Reptile - Kill your opponent with a double flawless match and a fatality on The Pit, after various objects pass over the moon.

Press [F10] to enter the setup menu. Hold [Shift] and type DIP to display a set of dip switches that can alter game play. Turn on one of the following dip switches to activate the corresponding cheat function. Note: the game may need to be restarted in order for some codes to be completely enabled.

Switch Effect
1 Toggle fatalities
2 Toggle blood
3 Toggle comic book offer
4 Toggle CPU fatalities
5 Toggle unlimited continues
6 Slow CPU recovery

Unlimited credits - During a loss against the CPU, press [F2] when the phrase "Finish Him!" appears. A two player match will begin. Choose any fighter and select Sub-Zero as player two. Win the fight and allow player two's counter drop to zero. The previously lost CPU match will restart without the use of any credits.