Open Mortal is a parody of the once popular coin-up fighting game, Mortal Kombat, for Windows and Linux. It is currently playable, has 18 playable characters. There is network game, team mode, etc. You can even add your own character.
The download include windows version 0.7.1, Mac v0.7 and Linux (source code). I think you can also use the characters in the MUGEN engine.
Open Mortal v0.7.1
145.0 MiB - 997 downloads