Return to Jurassic Park is a mod for the 1998 PC game "Trespasser" set on Isla Nublar several years after the events of the first film. Running on an upgraded Trespasser engine, players will get to explore the abandoned facilities through nine expansive levels covering the entire island, while at the same time searching for weapons and supplies as well as solving challenging puzzles; encounter a wide range of dinosaurs, from the tiny compsognathus to the massive aquatic tylosaurus; and uncover a story unlike any previously presented in a Trespasser mod.
Somewhere in the endless tropical jungles of central Isla Nublar, many roads meet around a high-security gate in the tall perimeter fence. Once designed to keep the denizens of Jurassic Park contained to their own enclosures, the still-standing network of electrified fences now serve as loose barriers between territories and hunting grounds.