Most everyone familiar with electronic games has heard of Street Fighter II - the most famous beat-em-up series ever. Basically you get a bunch of fighters together (8 in this case) and get them to punch, kick, bite and thump the bejesus out of each other then you're close.
Characters playable in Street Fighter II are, Ryu, Ken, Chun Lee, Guile, M. Bison, Sagat, Balrog and Blanka. Here yet another slightly different version of the game turns up - this time on Sega's Genesis / Master System.
This, the Master system, version of Street Fighter II can be a little slow. There is another version available in the Fighting Games category
and maybe elsewhere!