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Operation Genesis features twenty-five species of dinosaurs, including thirteen of sixteen that appeared in at least one of the Jurassic Park films. Most of the dinosaurs, however, are based on their look and appearance in Jurassic Park III, even if they were in the previous films. Each species has its own behavior. Each species is ranked using a star rating (1-5) based on their popularity with the virtual visitors, as well as grouped into one of four major categories based on size and diet:

Dinosaur	Group	Star rating	Film that the coloration is based on
Dryosaurus	Small herbivore		N/A
Gallimimus	Small herbivore		Jurassic Park
Homalocephale	Small herbivore		N/A
Kentrosaurus	Small herbivore		N/A
Pachycephalosaurus	Small herbivore		The Lost World: Jurassic Park
Styracosaurus	Small herbivore		N/A
Ankylosaurus	Large herbivore		Jurassic Park III
Brachiosaurus	Large herbivore		Jurassic Park
Camarasaurus	Large herbivore		N/A
Corythosaurus	Large herbivore		Jurassic Park III
Edmontosaurus	Large herbivore		N/A
Ouranosaurus	Large herbivore		N/A
Parasaurolophus	Large herbivore		Jurassic Park III
Stegosaurus	Large herbivore		Jurassic Park III
Torosaurus	Large herbivore		N/A
Triceratops	Large herbivore		Jurassic Park
Albertosaurus	Small carnivore		N/A
Ceratosaurus	Small carnivore		Jurassic Park III
Dilophosaurus	Small carnivore		Jurassic Park
Velociraptor	Small carnivore		Jurassic Park III
Carcharodontosaurus	Large carnivore		N/A
Acrocanthosaurus	Large carnivore		N/A
Allosaurus	Large carnivore		N/A
Spinosaurus	Large carnivore		Jurassic Park III
Tyrannosaurus	Large carnivore		Jurassic Park III

[edit] Scrapped and missing dinosaurs

Compsognathus, a major feature in the franchise is notably absent presumably due to its very small size which would have created tremendous logistical problems. Other species missing include two that were shown as embryo species in cold storage in the first film; Metriacanthosaurus and Proceratosaurus, and two others from the Jurassic Park films; Mamenchisaurus and Pteranodon (which was absent alongside any flying reptiles and aviary structures).

Revision of the files in the PC version showed that more dinosaur species were planned to be in the game, but got scrapped for unknown reasons. Those species are: