The game takes place on a remote heavily forested peninsula, where the player character Eric LeBlanc must fight off cannibalistic monsters, while searching for his son Timmy after a plane crash.

The game features nonlinear gameplay in an open world environment played from a first-person perspective, with no set missions or quests, empowering the player to make their own decisions for survival.

In combat, they regularly attempt to protect one another from injury, remove torches, surround the player, hide behind cover, drag wounded tribesmen to safety, keep their distance, use tactical decisions, not overextend into unknown territory, and occasionally surrender out of fear.

[3] As the player progresses through the game and explores the caves underneath the forest surface, they will encounter increasingly bizarre mutations, including deformed babies and mutants with several extra appendages.

The game begins with Eric LeBlanc, a survival television actor, sitting in an airplane with his son, Timmy, before it suddenly crashes on a remote heavily forested island.

Despite being the sole survivors of the crash, a disoriented Eric watches helplessly as Timmy is kidnapped by a man covered in red paint before falling unconscious.

Upon awakening in the wreckage, Eric goes out in search of his son but discovers that the island is occupied by feral cannibalistic mutants, and is forced to defend himself while surviving on the land.

Eric eventually reaches an abandoned underground lab complex owned by Sahara Therapeutics, a large research company responsible for experimenting with creatures on the island.

Created by a mysterious group called the Ancient Ones, the artifact has the power to resurrect the dead but requires a child sacrifice.

Eric also learns that his son's kidnapper, Dr. Matthew Cross, was a chief researcher at the facility before losing his daughter Megan to an escaped mutant.

Despite being too late to save his son, Eric realizes that the machine connected to the artifact can still be used to resurrect Timmy and goes deeper into the facility in search of a sacrifice.

Eric eventually encounters the revived Megan but discovers that the machine has turned her into a mutant and is forced to kill her when she mutates further.