This is the Sega CD game based on the 1993 Steven Spielberg movie based on the book by Michael Crichton. This game differs greatly from other Jurassic Park games. It is a point-and-click adventure game, with a strong emphasis on action sequences which require split-second timing.
The story takes place after the events of the movie/book. You are sent back to Jurassic Park to retrieve dinosaur eggs from around the park and put them in an incubator. You only have 12 hours to retrieve one egg from every species of dino in the park. Unfortunately, shortly before arriving at the park, your helicopter crashes!