Action Games at Round Games: your zone to play free online Action Games no download. The action game is a game genre that emphasizes physical challenges, including hand–eye coordination and reaction-time. The genre includes a large variety of sub-genres, such as Fighting Games, beat ’em ups, Shooting Games and platform games which are widely considered the most important ones. Though multiplayer online battle arena and some real-time strategy games are also considered to be part of this genre. We collected hundreds of the best free online Games. These games include browser games for both your computer and mobile devices. Play the best Online Games now on Round Games. Enjoy and have fun.