The Jurassic Park games that exist haven't quite lived up to what we really want, but Jurassic Life, this Source mod that combines Half-Life 2 and the dinosaur-filled island, might be able to.
It's a fan-made project that probably has years to go until its release, but right now it looks fantastic. And if you're a modeler or programmer, you can apply to help out as well.
What do you want out of a Jurassic Park game? Is blasting raptors with a shotgun entertaining enough?