This section is taken from the Dinosaur Field Guide.
- "Lot number 2, ladies and gentlemen, a juvenile Allosaurus. A fierce and aggressive predator."
- —Gunnar Eversol introducing a juvenile Allosaurus to auctioneers(src)
Allosaurus (meaning "different lizard") was the most common predator of the Late Jurassic period and the most dangerous. Like most theropod dinosaurs, its jaws were filled with serrated teeth shaped like blades. Computer studies suggest that Allosaurus attacked by using its upper jaw like a machete to hack at its victim, then it used its lower jaw to bite out a slice of meat, although recent studies have proven this unlikely. In terms of size, it was the third-largest theropod of its era, only the likes of the megalosaurid Torvosaurus (10-11 meters or 33-36 feet with 4-5 tons of weight behind it) and Saurophaganax (12-13 meters or 40-43 feet with 6 tons of weight behind it) exceeded it in size and weight. It averaged around 8.5 meters long (28 feet) and around 3 meters (10 feet) tall. However fragmentary remains suggest larger lengths of 11 to 12 meters (36-39 feet), though its weight would be less than the Saurophaganax, which was the heavyweight theropod of the Jurassic.
It might have been easy for an Allosaurus to kill a fairly defenceless dinosaur-like Camptosaurus, but Stegosaurus could certainly fight back, and the sauropods (giant long-necks) were so huge that they could easily crush even an adult Allosaurus with a blow from their tail, or a stomp from their legs. Thus it is thought that the Allosaurus hunted in large hunting gangs, similar to that of the Komodo dragon. While this means they hunted 'together', it was still every Allosaur for itself. Often at times, an entire gang of these dinosaurs would be killed by their prey or by natural hazards, showing they had poor group coordination.
It is known that Allosaurus led a dangerous life. The Allosaurus on display at the Smithsonian Institute has a smashed shoulder blade, several broken ribs, and a lower jaw so damaged that paleontologists didn't realize it was an Allosaurus jaw for over 100 years! But these were tough dinosaurs: Their bones show that they likely lived long enough for their wounds to heal.
In the early 1990s, InGen had completed 12% of the Allosaurus genome for exhibition in the original Jurassic Park on Isla Nublar, but this completion of its DNA sequencing had to be put on hold due to InGen's financial trouble. The sequencing of its DNA would eventually be finished by the time that Jurassic World opened up to the public.
It is revealed that there are surviving Allosaurus populations remaining on Isla Nublar after the 2015 Incident, but will now face an impending danger, alongside many other creatures, in the form of an erupting volcano.
Interestingly, unlike the rest of InGen's cloned theropods, the wrists of the adult Allosaurus are not pronated, though juveniles do have pronated wrists. It has a thicker head than in real life, and it was slightly oversized, being 10.4 meters (34 feet) instead of 9.7 meters (32 feet). Adults have exaggerated crests and spines running down their backs. The Allosaurus clones as adults are mostly dark greyish blue with a yellow underbelly, and a blue tongue while the juveniles are mostly dark blueish-grey with yellow underbellies, yellow stripes on the face and neck, a yellow circle around its eye orbit, white markings, and faded red on their crests.
At least five other Allosaurus are later captured by Ken Wheatley and his men and are taken off of the doomed island to Lockwood Manor, where they are auctioned off to the highest bidder by Eli Mills and Gunnar Eversol. During the auction, a juvenile is bought by a wealthy client. The remaining Allosaurus are later seen running free in a stampede with other dinosaurs to escape the estate, while the juvenile that was bought at the auction is last seen in a truck being shipped off to its buyer.
One year after the dinosaurs’ escape from Lockwood Manor, one of the juvenile Allosaurus has fully matured and taken up residence in Big Rock National Park. It attacked a family of Nasutoceratops that were foraging at a camping ground, only to turn its interest on a family of campers in an RV. The Allosaurus destroyed the RV, but was scared off when Kadasha fired two crossbow bolts into its face.
- In Jurassic Park III, an illustration of an Allosaurus skull was seen on the Montana State University logo. This is strange because the dinosaur has never served as the university's mascot in any capacity.
The Lost World: Jurassic Park video game
Allosaurus first appeared in the PSX/Sega Saturn game of The Lost World: Jurassic Park. Here, they were shown as living in caves near the Human Camp in large numbers and would attack the player's Tyrannosaurus rex moving through the area. They bear a similar orange/brown striped pattern to the later appearance in Operation Genesis. The Allosaur’s existence in this game might be the reason why Giganotosaurus is not featured here, although the Giganotosaurus is seen in Velociraptor’s gallery. The coloration also resemble the Velociraptor variant seen in The Lost World: Jurassic Park.
Jurassic Park III: Park Builder
Allosaurus also appears in the game Jurassic Park III: Park Builder.
Jurassic Park: Operation GenesisJurassic Park: Operation Genesis. They appear to be orange to brown in color and they seem to spend most of the time stalking in the dense woodlands. Even though it is not quite fast enough to catch prey such as Dryosaurus, it will ambush and kill them if it can seize an opportunity. It is also notable that unlike the other large carnivores, who will Brachiosaurus, but will attack smaller prey close to its size. It is also somewhat more robust than the actual animal (though this might because it is based on the African species, A. tendagurensis which the latter's is from the formation excavated in the game, although classified as an Allosaurus for years, the most recent analysis has placed Allosaurus tendagurensis in the carcharodontosauridae).
Jurassic Park: Explorer
Allosaurus is featured in the DVD game Jurassic Park: Explorer. A player earns a dinosaur when he/she wins a minigame, when the earned dinosaur is an Allosaurus this video will be shown. The Allosaurus in this game was actually, a recolored Tyrannosaurus. Presumably, when the game was made, the developers did not have enough time to create an Allosaurus, so they reused a T. rex to portray the dinosaur. This also happened with the Albertosaurus.
Jurassic Park: Builder
Allosaurus can be created in the park in Jurassic World: The Game as a Rare dinosaur. Like most large theropods, it uses the same model as Tyrannosaurus rex, which in turn depicts it with two fingers instead of three.
Allosaurus appears in Jurassic World: Alive, with the main GEN based on the Fallen Kingdom juvenile, while the GEN 2 is based on the Battle at Big Rock adult.
Allosaurus appears in a free Jurassic World: Fallen Kingdom update for Jurassic World: Evolution. It looks almost exactly as the juveniles in Jurassic World: Fallen Kingdom, although the only major difference is that the game version has spines going down its back.
It was among the many dinosaurs that were released by Ludlow on the unsuspecting town of Glen Rose, Texas. The Allosaurus attacked the vehicle that Dr. Alan Grant was in, destroying it and forcing Grant to try to flee on foot. However, the Allosaurus manages to corner him. But, before it can kill Grant, it’s lassoed by Dr. Backer (which is probably an intended nod to the classic dinosaur film Valley of Gwangi.)
Jurassic Park: Dangerous Games
Allosaurus was one of the dinosaurs created by InGen for Jurassic Park in the comic series Jurassic Park: Dangerous Games. After the Isla Nublar Incident it became a wild species like most of the dinosaurs.
Two more Allosaurus later appear towards the end of Espinoza's mission. The pair attempt to chase his dirtbike and kill him, but the agent is able to escape from the dinosaurs and catches his helicopter to escape the island, with the dinosaurs watching him depart.
The Lost World Series 1
Allosaurus appears in The Lost World Series 1 toy line with a Dino-Damage Medical Center and has 4 removable parts. Allosaurus is often sold separately by some figure collectors. It bears an orange/brown striped pattern, similar to the PSX/Saturn The Lost World's Allosaurus.
Jurassic Park 2011 toys
An Allosaurus prototype was made for the Jurassic Park 2011 toys, complete with a Dino Damage wound which resembles Isla Sorna. This particular mold is unique featuring more articulation than any Jurassic Park dinosaur figure ever made. It also appears to be inspired by Papo's own Allosaurus.
Jurassic Park 3D
The prototype of Allosaurus from the canceled Jurassic Park 2011 toys is reused for the Jurassic Park 3D toy line. Its coloration appears to be inspired by the Guanlong in the animated film Ice Age: Dawn of the Dinosaurs. The Allosaurus also makes an appearance along with the Pachyrhinosaurus from the same toy line is seen in Jurassic World as one of the many toys sold in one of Main Street's tourist regions. For the special occasion, the 3D toy line figures were put in Jurassic World exclusive boxes.
Upon the production of the upcoming Jurassic World, Allosaurus toys have been made. The mold is completely different from the other franchise releases and a slimmer physique and has more prominent horns on its head resembling the illustration done by L.D. Austin. Much like the prototype Allosaurus in the 2011 toy series, this mold holds much articulation than other Jurassic Park dinosaur figures ever made but bears a similar color to the Lost World series. It had a bright golden body and was red pattern on its back. Like most the other dinosaurs of the Jurassic Park toy series, this Allosaurus was complete with a Dino Damage wound but was not as widely opened as some other toys.
A new figure of Allosaurus will be released as part of the toy-line for Jurassic World: Fallen Kingdom. It is part of the "Roarivores" line, which is a line of electronic dinosaurs with roaring sounds, and is set to be part of the "Dual Attack" line, which is a line of dinosaurs with two action gimmicks.
- Jurassic Park: Builder states that Allosaurus is one of John Hammond's favourite dinosaurs.
- Allosaurus appears on one variant of the cover of The Lost World despite its absence in the book.
- In early CGI production of the dinosaur stampede during the pyroclastic flow in Jurassic World: Fallen Kingdom, the Allosaurus present was going to have a much different death. Instead of being hit by a volcanic rock, it was originally going to show the dinosaur attempting to ambush a juvenile Triceratops before being gored to death by the infant's mother.
- In Battle at Big Rock, the adult Allosaurus is seen to have supinated wrists instead of pronated wrists, but the GEN 2 Allosaurus, based off of the short film model, from Jurassic World: Alive, has pronated wrists, as well as the concept art for the film model. It is unknown if the adult Allosaurus can pronate its wrists.
- The Allosaurus in Battle at Big Rock was based on the species Allosaurus jimmadseni.