Aliens harvesting humans to save themselves from a plague! Humans turning over their own to save their lives! I think the makers were trying to address some Big Moral Issues about what people would sink to in order to save themselves, but this movie just gets lost in the details. It is very distracting when the alien soldiers dress like waiters. Also, stand straight up in the open when someone shoots at them (I guess this proves they are not human?). And it's very disconcerting the way the humans shoot them with machine guns, and just happen to get them right between the eyes - even if only a couple of times. Then there's the earth resistance, who are desperate to get alien technology to turn it back on them, and never actually try to pick up the sidearms the alien soldiers drop when the resistance fighters kill them by the truckload (well, they don't take cover - do they?). They need a Scientist who was studying Wreckage from an Alien Crash to figure out that we can use their weapons. There's a lot of this stuff - too much for a good action movie, and not enough explanation, character development, etc. for an issue movie. Thud.
Review of Alien Siege
