Mortal Kombat II (commonly abbreviated as MKII) is a competitive fighting game originally produced by Midway for the arcades in 1993. It was later ported to multiple home systems, including the PC, Amiga, Game Boy, Sega Game Gear, Sega Genesis, Sega Saturn, Super Nintendo Entertainment System, and various PlayStation consoles, mostly in licensed versions developed by Probe Entertainment and Sculptured Software and published by Acclaim Entertainment (currently distributed by Warner Bros. Interactive Entertainment).

Mortal Kombat II was the second game in the Mortal Kombat series, improving the gameplay and expanding the mythos of the original Mortal Kombat, notably introducing more varied Fatality finishing moves and several iconic characters, such as Kitana, Mileena, Kung Lao, Noob Saibot, and the series' recurring villain, Shao Kahn. The game's plot continues from the first game, featuring the next Mortal Kombat tournament set in the otherdimensional realm of Outworld, with the Outworld and Earthrealm representatives fighting each other on their way to challenge the evil emperor Shao Kahn.

The game was an unprecedented commercial success and was acclaimed by most critics, receiving many annual awards and having been featured in various top lists in the years and decades to come. The game caused a major video game controversy due to the series' continuous depiction of graphic violence. It has since been called one of the most controversial and greatest video games of all time. Its legacy includes spawning a spin-offgame Mortal Kombat: Shaolin Monks and having the greatest influence on the 2011 reboot game Mortal Kombat, as well as inspiring numerous video game clones.