T-Rex, also known as the Tyrannosaurus Rex is the the king of all the dinosaurs. This ultimate predatory dinosaur has invaded many territories from many eras, including the Jurassic, Triassic and Cretaceous rea. This top dominator dinosaur survived and made their way to the most recent prehistoric era, the ice age era.

The native monsters and beasts apex predator such as Saber-toothed Tiger: Smilodon, Terror Bird: Titanis, Short-faced Bear and apex herbivore such as the Woolly Mammoth, Woolly Rhino and Paraceratherium/Indricotherium all want to defend their homeland from Tyrannosaurus Rex invasion. They fight hard to become the dinosaur master and survive in the harsh environment of ice age era.