Street Fighter II - The World Warrior, also know as Street Fighter II Nes is a MUGEN fighting game with retro graphics
A lot of game modes: Super Battle, Versus Battle, Team Battle, CPU Battle, etc... You can play it alone against a computer opponent, play it with mates or even let the computer play it on his own.
In Player select screen: Use arrows and L = accept
Controls (Keyboard or joystick) reconfigurable:
Player 1: Arrows (move) + L : " , . / (attack)
Player 2: Numpad 2,4,6,8 (move) + numLock / - + Enter (attack)
Esc = Exit to menu