If you want a good story and character development, watch a kdrama. This movie's all about one thing and that is brainless spectacle and comedy, with technical feats that prove Korean cinema can make movies just as action packed as American titans, a large part of why I had to watch how far we could go. Tricky camera angles, seamless CGI integration, no shortage of stunts and total disregard for any historical accuracy or scientific justification whatsoever. The protagonist's sword in this looks like an oversized Egyptian khopesh lol.

While the sequel does give you enough to know as a standalone movie, I highly recommend watching Alienoid 1 first if you haven't already, because to be frank these two films are basically one movie split in half. You miss out on half the cool stuff you're being sold if you don't bother with the prequel, and the cruelty of the cliffhanger of the first is struck down for good with the absolute conclusion of the sequel.

This movie is also recommended to watch with children if you have any to watch them with, and although there is a body horror element with the aliens doing their thing, the films totally omit the gross outs of juvenile humor, none of the violence revels in gore for shock value, and the only person who's going to get offended by the content of the movie is the kind of person who demands realism and depth in a quick flick about time travel alien busting with sword and sorcery.

Only thing I'm disappointed with is that the cool robotic suit of armor is underused in both films, it's like if Iron Man had to save on batteries.