Aliens is an amazing sequel to Alien, and improves it in every single way. From the very beginning, it kept your interest. The premise is excellent, years has passed since the first movie and a lot has changed. While the reason given for Ripley to go back to that world can be weak, it's nothing too unbelievable. Once back on the planet, the tense atmosphere never relinquishes its grip. It is much more action packed and since they have more aliens, more room in the setting for characters to run around and more firepower, there are some amazing scenes. This movie doesn't rely as much on the hidden predator as it did in Alien, we see full shots of the aliens all the time. It was great that we get to learn more of the alien's biology as well, allowing us to understand how the aliens breed and survive. While the ending was a bit dodgy in terms of "there was no way the character could have survived" type of thing, Alien's is fantastic movie that still instills excitement and fear nearly 30 years later.