Like games like King of Dragons and Final Fight? Wish you could play an online game similar to Golden Axe (the first 2)? Well, check out Dungeon Fighter Online, which goes into open beta tomorrow, for possibly that fix you need.
DFO is a 2D online fighting game similar to the above mentioned games but it is multiplayer, has some RPG elements to it and looks really awesome (check the pics). Be prepared though, the initial download is about 1.07 gigs so you might want to start downloading it now at Dungeon Fighter Online