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.
Once the first animals had been transferred to Isla Nublar, Jurassic Park Animal Control comissioned gates such as this one in locations leading to areas which might be considered below the safety requirements for InGen's security protocol. Should one of these containment areas become compromised, the intent of these gates was to prevent the creatures which may have escaped their initial holding pens from moving deeper into the Park...
Nice.