A year after the events of The Lost World the Site B Island lies in ruins. InGen's dream of reviving the dinosaurs is dead. John Hammond publishes a memoir, a history of the InGen Corporation, but no one is sure whether to believe it. The island is half news story, half urban legend. In a freak accident, your plane crashes in the waters near Costa Rica. You awaken on a beautiful sandy beach on a tropical island. But you soon realize that this island is not what it seems--the accident that brought down InGen preserved the island. It holds danger, but it also holds secrets about the past.

Gameplay is from a 3D, first-person point of view and features real-world outdoor environments combined with detailed interiors. The physics-based gameplay gives you the freedom to do things the way you want. Although there are clear, linear goals and objectives, each player's experience will be different from the next.

Trespasser supports both hardware-accelerated and software-rendered modes.