Dinosauriness: A number of dinosaurs with very silly names. Quite why the silly names I'm not too sure. Perhaps it is so that know-it-all palaeontologists can't later poo poo some of the made up dinosaurs and other prehistoric creatures as they are want to do. Perhaps there has been some crazy isolated insular evolution going on on Skull Island which led to the total loss of feathers. And silly names. Anyway there's some sauropod ones, theropod ones, some hadrosaurs, some permian mammal-alikes, ancient giant crocodiles, some pterosaurs and the very silly named Vastatosaurus rex.
Scientific Accuracy: I quite like the idea of making up some dinosaurs rather than lazily skimming described species. This gives you a lot of artistic freedom and a way to ignore the palaeontologists who go to cinemas and concentrate on biodynamics and scale rather than the action/drama etc. I'm giving it a 5/10 but only because it could be a 0/10 (they are all made up) or a 10/10 (they made them up so how can it be inaccurate?).
Buzz Bonus: All dinosaur fans should play this game. It has some nice settings some cool set pieces and spear throwing. Who doesn't love themselves some spear throwing?