Set inside a shiny cave located in the Triassic period.ДЄccording to Pterrance, the T.rex has scared a baby Saurolophus onto one of three islands in a sea of tar, where it has become stranded, and he has proven unable to help. For each direction from start to finish or back, Rolf will experience a different encounter with something dangerous and have a different reaction to each one depending on which direction he is going. For each card laid on the map are two pictures for the player to choose in order to make the path more fun (e.g., volcano/T.rex cave, carnivorous plants/frozen pond, quicksand/rickety bridge, etc.). Two caves means just looking for a friend, while three caves will consist of Rolf looking for a lost baby dinosaur and returning it to its mother, the latter only occurring on harder levels. The player can make a map consisting of two to three caves, with cards connecting them to complete it and make a path for Rolf to find the other dinosaur. Rolf must build a map leading to his lost Torosaurus friend(s). For each game, there are three levels to chose from: easy, medium, and hard.

There are six mini-games overall, two for each time period. Throughout each time period are mini-games which provide the hatching crystals necessary to hatch an egg.

The player can only collect up to three crystals at a time, and if you find an egg and have all three crystals, then the player can bring all back to the volcano and hatch it, and then go back to looking for the other eggs. Every once in a while, Pterrance will pop up and provide hints on where an egg may be hidden, and the player must use a special hunting crystal to find the egg the player only gets three guesses, and each wrong answer lures the T.rex closer until it appears out of nowhere and attacks, leaving Rolf and Pterrance to start looking for an egg elsewhere, if the player does not get the correct answer in time. The player can explore any of the three periods while Rolf will also provide some fun facts about dinosaur behavior and scientific fossil studies, including miniature videos of the dinosaurs or prehistoric non-dinosaur creatures that they encounter (three viewings of the same video provide different fun facts).

The island is cut into three sections: the Triassic, Jurassic, and Cretaceous periods, all separated by water or deep gorges. Rolf leads the player, alongside his friend, Pterrance the Pteranodon, on a quest to find nine missing eggs and bring them back to the volcano, located at the center of the island, to hatch them in the nursery and use them to their advantage in ridding themselves of the T.rex. Through an opening video, Rolf explains that a Tyrannosaurus rex has come to the island and begun terrorizing all of the dinosaurs living there during the predator's rampage, many of the dinosaurs' eggs were abandoned during the attack and become scattered across the island (according to Rolf, this has been going on for some time). The game is hosted by Rolf, a Parasaurolophus who leads the player on a journey through Paleo Island.

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