You were once just a typical tyrannosaurus--10 tons of terror with lots of teeth and a bad attitude. Now, thanks to an inventor from the future, you're reformed giant reptile called Rex--and you're hopping mad! Evil professor ScrewEyes has captured your 20th century human friends, Louie and Cecilia, and only you have the brains ans brawn to set them free! Time travel through 5 challenging worlds of animated action and adventure with your super intelligent dinosaur pals, Elsa, Woog and Dweeb. As you make your way from the jungles of the Jurassic period to the streets of modern day New York, you'll need all the help you can get to over come obstacles, avoid clever traps and find hidden power bonuses. And be careful of "Brain Drain"-- too much and it's back to munching on bronto burgers in the prehistoric jungle! So step on it big guy! And watch out for cabs!