In one of the caves located near the city of Rio in the cave, scientists found a dinosaur and were able to revive it. When transported to a special base, the dinosaur was able to escape. Now we are in the game Rio Rex will have to help the dinosaur get out of the city. Our hero will run through the streets in the direction of the forest. On his way will come across various obstacles that you need to destroy. People who you will come across a dinosaur must gobble up. It will help you to restore the standard of living.