4Staff Sergeant Akira Sakai leads his squad of battle-hardened marines into action. The mission: kill the threat and rescue the hostages. Little did they know another enemy awaits them-an enemy more vicious and ruthless than anything they've ever encountered. The marines quickly discover that the region is overrun with prehistoric predators. Giant pterodactyls attack the dropship, eliminating any possibility for immediate escape. Raptors, hungry for human flesh, stalk the team and pick them off one by one. To escape, the team must trek through thick forest and sludgy marshlands, where field of view is limited, and bloodthirsty predators await at every turn.