I have no idea what this is?

Well, this is a C++-program made with the very great 32-bit compiler DJGPP.
It's a graphical fighting-game with the following features:

• VGA or ModeX Graphics Mode
• Mod or Midi Music
• As many human players as your keyboard can handle
• Edit your own characters and stages
• Great menu with a Sound-Studio
• 50 animations/character (make them yourself)
• 8 great songs made by ZJ
• Moves, such as KICK, DODGE, JUMPKICK etc
• Totally free!!!