Edmontonia

Edmontonia ("lizard from Edmonton [Canada]") is a nodosaur, a kind of ankylosaur without a tail club. It had two large spikes on each shoulder that pointed out to the side. These spikes were a great defense against predators because they were at the same level as the knee and calf muscles of a larger Theropod, or meat-eating dinosaur. If attacked, this slow-moving tank would throw its weight behind these spikes and drive them into the predators legs. This would immediately disable the attacker and allow Edmontonia to walk away.

Although the the skull of Edmontonia was long and shallow, it had room for four sinus cavities. This meant the skull was lighter, and probably improved the dinosaur's sense of smell. Edmontonia's teeth were amazingly small for such a large animal. One tooth was only half an inch (1 cm) long and barely a fifth of an inch (5 mm) wide - far too small for eating most plants. Did Edmontonia also eat ants and insects, like the modern anteater? Or were its teeth disappearing over time because its beak did all the work? These are mysteries that dinosaur detectives have yet to solve!

More real-life information: Edmontonia at Wikipedia.

Jurassic Park inspired games
Edmontonia Jurassic Park III: Park Builder.