Alien - Sucessful creepy, suspense, thriller. This started it all in a good way - B+
Aliens - One of the best scifi action flicks ever. Great acting, great effects, great characters, just an all around great movie. James Camerons masterpeice - A
Predator - Great scifi military thriller. A very suspenseful and fun movie - A-
Predator 2 - Very underrated movie. A very action packed movie. Almost as good as the first - B+
Alien 3 - A failed attempt to go back to the first movies feel. Everything in the end falls flat - C-
Alien Resurection - Filled with plot holes and horrible acting. Still it has a couple good moments - C
Alien versus Predator - Seeing these creatures fight is fun. Its brought down by terrible acting, large plot holes, and its PG-13 rating - C+