Areas that should be darkened are all unreasonably bright in the game, even rooms in buildings where there's no lighting and the windows have been barricaded.
Tyrannosaurus rex didn't live for 25 million years as the narration claims, it was only around for about a mere two million years.
In one of the street signs in the town, Jules Verne's name is misspelled as "Jules Vrene".
The subtitles commit the common layman mistake of misspelling Tyrannosaurus rex as "Tyrannosaurus Rex" and its abbreviation T. rex as "T-rex." According to the grammar of zoological nomenclature, the species name "rex" is always written in lower case letters, without a hyphen.
Due to the game's rushed development, you can find numerous objects, plants or structures throughout the levels that are floating in the air. Most notably, the command center's supports in Level 4 don't touch the ground and there's a floating tree nearby, and there's a floating padlock in Level 3 near the small shack.
The doorway leading to the staircase in the InGen office building on the dock lacks textures. It is fully a shadeless, flat tan color.
The stone-head booby traps at the Mayan staircase are coded incorrectly. Even if the player shoots them down to avoid activating them, stepping on the trigger spot still makes the heads jump forward, even though they're not attached to the trap mechanism anymore.
Due to coding errors, sometimes dead dinosaurs continue to make noises and move their mouths. Usually touching them gets them to stop and go into "dead mode".
On the billboard in the town's communication center, Henry Wu's name is misspelled as "Henrey" and the word returning is misspelled as "returnong".
The "box" that was meant to activate the music at the very start of Level 3 has been placed too high, so the intended music doesn't play. It can be activated by climbing onto one of the large rocks at the level's beginning and jumping until the music plays.
The last level has a mechanical, moving bridge connecting the stairs to the mountainside, but there is no mechanism that would control the bridge. It is literally a sheet of metal that moves by itself, attached to nothing.
Though the game was meant to be an official sequel to the first two Jurassic Park films, it doesn't fit into their continuity. It repeatedly places the events of the first film as having taken place in 1989 (as in the original Jurassic Park novel), when the movie actually takes place in 1993. The appearance of 1992 Jeep Wranglers pokes further holes in the game's supposed timeline, as those did not exist back in 1989 and therefor could not have been left on the island.
When Anne radios for help, the subtitles are several seconds out of sync with the dialogue, and the punctuation contains several typos.
In the town level, Hammond's narration claims the shoreline where the game started is the south beach. It also says the lowlands are to the south and the laboratory is to the east. But the map inside Hammond's office places these locations the exact other way. The beach is shown to be up in the northeast and the laboratory is situated west of the town. Either the narration or the map are completely wrong.
It is explained that the narration by John Hammond is actually Anne remembering what she has read in Hammond's book. But if so, why does she at times react to Hammond's lines if they are only in her head?
John Hammond's narration claims that the Brachiosaurus was the "only true Jurassic native" of Jurassic Park. This is not true: Stegosaurus, which also appears in the game, was another Jurassic dinosaur, as well as Dilophosaurus and Compsognathus from the movies. He is also mistaken in labeling it the oldest dinosaur in the Park. Dilophosaurus lived tens of millions of years earlier.
Hammond's narration at one point says that 65 million years is equal to 65 thousand centuries. It's actually 650 thousand centuries, or 65 thousand millennia.
Hammond claims that the Velociraptors seen in Jurassic Park originally lived in China and Mongolia. While this is true for real-life Velociraptors, the "raptors" in Jurassic Park were actually based on a related North American dinosaur called Deinonychus. At the time of the original novel's writing a scientist called Gregory S. Paul considered Deinonychus to be a species of Velociraptor, which was explained in the novel but not in the movies. The raptor skeleton being dug up in Montana in the beginning of the first film is also a Deinonychus, mistakenly referred to as a Velociraptor.
According to Hammond, the "great hunters of the early Pliocene" were the last humans to see such big, undiscovered forests like the ones on this island. Humans didn't evolve until after the Pliocene, and the early, primitive hominids that were alive during the Pliocene were certainly not hunters yet. He would perhaps be correct had he said "late Pleistocene".
Hammond's memoirs say the dinosaurs of Jurassic Park stemmed from "65 to 100 million years before man." However the most ancient dinosaurs of the park were closer to around 200 million years old, and two dinosaurs that appear in the game (Brachiosaurus and Stegosaurus) were around 150 million years old.