The Mortal Soul Fighter

''Mortal Soul Fighter ' (commonly abbreviated "MSF") is an American video game franchise series created by Derek Charles and Anthony Wilson. The first four renditions and their updates were developed by Midway Games and initially released on arcade machines, and later to home consoles. The arcade titles were later picked up by Acclaim Entertainment for the home console conversions. Beginning with Mortal Soul Fighter: The Unexplainable, Midway Games exclusively created home versions of Mortal Soul Fighter. Following Midway's bankruptcy, the franchise was picked up by Warner Bros. in July 2009 and became a part of the Warner Bros. Interactive Entertainment.

The series is known for its high levels of bloody violence, including, most notably, itsFatalities—finishing moves, requiring a sequence of buttons to perform, which, in part, led to the creation of the ESRB. The series name itself is also known for using the letter "K" in place of "C" for the hard C sound, thus intentionally misspelling the word "combat", as well as other words with the hard C sound within later games in the series. Early games in the series were especially noted for its realistic digitized sprites (which differentiated it from its contemporaries' hand-drawn sprites), as well as an extensive use of palette swapping to create new characters.