Street Avenger is an action game for free. In this game, the only thing you should pay attention is how to beat the enemies, is how to kick all of the opponent's asses, is what is the boss weakness, where is the sweet spot.
The various kinds of combat system will draw your attention and make you enjoy the fighting in every stage. You can reset your keyboard map to make your manipulate more comfortable, and there is list of combo skills on the right column.
Don't you find that Adam and Herty are different when you take over them. Good luck, and enjoy the violent fight in the street.