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Albertosaurus appeared in the 1998 video game called Jurassic Park Trespasser. Albertosaurus was a tyrannosaurid theropod dinosaur that lived in Dinosaur Provincial Park between 73 and 70 million years ago in the Late Cretaceous period. It could attain a length of 9 to 10 meters (30–33 feet) and height of 3-3.5 meters (10–12 feet). It weighed about 3-4 tons. At one time Albertosaurus was thought to be the same as Gorgosaurus, another tyrannosaurid, but now they are considered two separate species. Albertosaurus was The Lion of the Cretaceous as it had a big number of plant eaters to feed on, especially ceratopsians like Styracosaurus or Pachyrhinosaurus, or hadrosaurs like Parasaurolophus or Corythosaurus. There is also fossil evidence that this large, ferocious predator may have hunted in packs to bring down too large, difficult prey like Edmontosaurus. Albertosaurus was similar to its cousin Tyrannosaurus only it would probably be more of a chasing predator due to its light build. Albertosaurus also had a more slender skull and bones making it a slim, graceful but still deadly predator.