Dinosaur Digs includes 20 new prehistoric animals to choose from including mammoths, saber-toothed cats, and varied dinosaurs as well as prehistoric-themed items and buildings. In addition, new types of electrical fences to accommodate the animals and prehistoric foliage have been introduced. As in the previous game, more extinct animals, foliage and better care for dinosaurs can be researched. Each dinosaur is adopted as an egg. The game introduces a new staff member, the scientist, to care for the eggs and, once it hatches, the dinosaur itself.
Despite the fact that the player can purchase electrified fences to keep dinosaurs contained in exhibits, it is still possible for them to escape. If one does escape, the player will have to hire a dinosaur recovery team to find and tranquilize it so that it can be returned to its exhibit.