The Lost World: Jurassic Park was a game designed by THQ for the original Game Boy. Another handheld version, The Lost World: Jurassic Park by Sega, was also the final game released in North America for the Sega Game Gear, released in August 1997.
InGen's rival BioSyn has taken control over the Isla Sorna (also known as "Site B"), InGen's breeding ground for the dinosaurs. Dr. Alan Grant, an agent of InGen corporation, is sent in by boat to the island, to bring control to the island again, fighting in environments ranging from jungles to labs.
In each of the eight levels, a number of items (dinosaur eggs, computer disks or DNA samples) must be collected to finish the level. Gameplay mostly consists of running, jumping and climbing through the large platform-like levels. However, in the jungles and caves of the island, many enemies await: Dinosaur species, including Tyrannosaurus rex and Velociraptor, and human enemies, employees of InGen's rival BioSyn. The player can defend himself by using kicks and punches, a pistol or a grenade launcher. Ammo and health power-ups can be found in boxes scattered around the levels.