Rio Rex is one of the best side-scrolling action games unblocked. Explore a special chapter in the series with a dinosaur online. The mission is to attack all of the people and everything you see on the path. It's really easy to bite or shoot the target within Rio Rex free. Each time you chew something or somebody, your scores will be increased. The new level will be unlocked after you fulfill the goal. Get ready to cause havoc through cities right now! Have fun!