Allosaurus

Allosaurus was one of the largest predators of it's time, during the Late Jurassic period. It was part of the Carnosaur family, which includes Giganotosaurus.

Facts
Measuring up to 32 feet long, Allosaurus was one of the kings of the Jurassic. It had to compete with dinosaurs like Ceratosaurus and Torvosaurus. One of it's common prey was Stegosaurus. Unlike Torvosaurus, it had a weak bite force even weaker than a modern day lion and used it's upper jaw like an axe. It would've let it's prey bleed to death and hunted in packs.

Ark Plan
Allosaurus was one of the many dinosaurs cloned, they somehow broke out and wiped out 99.9% of all humans. With humans fleeing underground, they took over the world. However, it wasn't the top predator that belong to Tyrannosaurus rex and Spinosaurus. Only one appeared in the novel, which was a sub adult.

It hunted Sky while she took a bathroom break before attacking. Sky was able to throw the knife at the dinosaur but it only made it angry. Todd was able to kill the sub adult, and the carcass was eaten by scavengers. It’s unknown if it appeared in Code Name Flood since there’s a dinosaur that looks similar to it, or it might be a T.rex.

Lost Files *NOT CANON*
Allosaurus

Length: 9 meters.

Height: 12 feet tall.

Status population: Stable.

These animals are the few known animals that will attack and eat humans. They are also one of the few large dinosaurs that are able to in thick trees area. Allosaurus hunted in large gangs to compete with Carnotaurus, T.rex, Spinosaurus, and humans. The largest one, named Alice kills at least 100 humans which equals the entire population of a large village. She had never been seen since Sky went to the surface. Although, she does have offsprings.