Mugen is a 2d fighting game like street fighter. You can make your own characters. And by that i don't mean some cheap online came with set hair styles and stuff. You use photoshop on this. And you can make your own stage backgrounds too.
Download: Search on Google Winmugen.
tut:www.mugenfury.com/tutorials/aides/help.htm (might be down. if so, use cached page from google)
yyeahhhh thats it for now. post some more later. thanks!