None.

Lots of violent fight scenes throughout. Characters are shot, stabbed, blown up, and killed in various other ways.

Multiple headless corpses are seen throughout.

Frequent swearing and use of words like f--k, s--t, b---h, d--m, etc.

A few characters can be briefly seen smoking cigarettes or drinking out of a flask.

The overall tone of the film is rather bleak.

The Monolith soldiers are mutant humans with grotesque features and are resilient to damage. While their appearance under their gear is only briefly shown, they are still quite menacing.