I am looking for a trilogy series with a one word title. The first movie has the female character saving a cat and the second she escaped with half an Android and a little girl and the third she sacrificed herself to save everyone

Dude it sounds like "Aliens"... with sigouney weaver. I think the first movie was made by Ridley Scott and the second by James Cameron.. the third I suspect by David Fincher. Yeah but the first was totally awesome. Hope that helps

It doesn't just sound like Aliens, it is Aliens. If there is another trilogy out there that has that description I will eat a shoe.