Someone on DeviantArt posted this article:
more about MUGEN
The interesting part is that you can mod the characters. This is also freeware, in fact. The downside is that it is 2D. 2D needs more love in this world of 3D games.
Well, I am dreaming of a Hetalia fighting game, and if the Game companies cannot be convinced, it is probably the time the fans take the opportunity. I wonder how will Himaruya will react to this, but since he does allow fan games, this would also pass in his eyes.
The main problem is how the nations fight.