Aliens (1986): After floating in space for 57 years, Lt. Ripley's (Sigourney Weaver) shuttle is found by a deep space salvage team. Upon arriving at LV-426, the marines find only one survivor, a nine year old girl named Newt (Carrie Henn). But even these battle-hardened marines with all the latest weaponry are no match for the hundreds of aliens that have invaded the colony.
vs
Predator (1987): Dutch and his team of commandos have been sent into a Central American jungle to track down some missing airmen that were kidnapped by terrorists. By the time they get to the camp, the airmen have been butchered in a very violent fashion and the commandos retaliate on the terrorists' camp. After that's over, they wait for a helicopter to pick them up, but something strange begins to happen in the jungle. It isn't long before the commandos start getting killed off one by one and Dutch, along with a woman from the camp named Anna are the only people left alive. What's been killing them is the Predator, an alien that hunts species and make his trophies out of their skulls. And human beings are the new species he has discovered.