The Aliens are incredibly uncanny and scary looking.
Milo and her mom have a couple of arguments, and Milo says something very terrible to her.
This film may be darker than average film.
There are scenes of a child nearly falling into several deep, dark chasms. There are scenes of a child being pursued through dark corridors by armed aliens. There are scenes of science fiction weapons being aimed at a child with intent to kill, including a scene showing a "target lock" on the child's head. There is a narrative of a mother being vaporized that shows a needle of energy approaching the mother's head. There is a sad scene of a mother dying of asphyxiation as her son watches.