In Jurassic Park: Operation Genesis, you build the hatcheries, feeding areas, and security equipment, then let the general public in to have some fun.
As in other park sims, you'll need to balance entertainment and safety (watch out for that rampaging T-Rex!) to keep your customers happy. Unlike other park sims, Operation Genesis gives you a full set of action-based missions that add more vehicle-based gameplay and shoot-'em-up fun.
The demo version of Operation Genesis includes a brief tutorial, two missions (sedating rampaging carnivores or taking snapshots of dinosaurs in action), three types of dinosaurs, open-ended simulation gameplay on "Site B," and the Dinopedia, a compendium of information about all the dinosaurs involved in the full game.