Mortal Kombat, like any game, would happen to have multiple versions of itself. It is even ported onto the Sega Master System, the Game Gear, and the Game Boy.
They are all the same game, but they differ by music and color.
The Game Boy version, however, suffered from one fatal flaw: The slow gameplay. The gameplay is REEEAALLLLYYY slow.
Thankfully, the Master System and Game Gear versions didn't have that problem, making them playable.
The gameplay is pure one-on-one fighting fun, although without the blood and gore. There are only 6 characters, unfortunately, so if you are a person who plays as Johnny Cage often or someone else that dropped out, then this is bad news for you.
The graphics are great and they almost match the arcade game's graphics style....kinda.
So after you fight several enemies, you would later fight a mirror version of your character. After that, you begin to fight one person after another. That will happen 3 times before you fight the final enemy. This makes the game stand out from the crowd.
There are 3 difficulty modes: Easy, Normal, and Hard, so everybody can have a shot at it.
Overall, this is a good game that you should purchase for your Game Gear. Or maybe you can get a Master System version, instead. Don't get the Game Boy version, though. I'm warning you.