Quote Originally Posted by Dizzy View Post
If the answer is not in the interview with elecbyte then we will never know I suppose.
The developer did mention that he forgot why he named his engine as MUGEN.

The program was written in C with the Allegro library. Beta versions were made for DOS, Linux and Windows, and was distributed through Elecbyte's official website. "M.U.G.E.N." is actually an unknown acronym. The creators never revealed what it actually means. In fact, they admittedly stated that they forgot what it stood for. lol.
Source documentation : https://www.fightersgeneration.com/features/mugen.html