It's not just dudes that have the epic battles -- this list entry proves that the ladies can throw down just as well. At the end of sci-fi classic, Aliens, Ellen Ripley goes back to destroy the unhatched eggs, which pisses the Alien Queen off to no end. There's no drama like baby mama drama, and the Queen seems to hold all the cards -- that is, until Ripley climbs into a powered exoskeleton and faces off with the angry xenomorph on her own terms. Great fight, great climax -- it's all here.