Predator

A squad of commandos led by Major Dutch Schaefer is hired by the CIA to rescue downed airmen from guerrillas in a South American jungle. The mission goes well but as they return with a captured guerrilla in tow, they find that something is hunting them. Nearly invisible, the mysterious being blends in with the forest, and begins killing the squad members one by one. Unlike the clearly marked, traditional battle lines that Schaefer is used to, this mission takes him into a new and terrifying world where old rules don't apply...