According to ESRB this game contains: Blood and Gore and Intense Violence.
Despite my comment on its potentially adolescent target group, parents should be aware, that F.E.A.R. is, due to its violent and scary content, a very mature title. If you wouldn't let your children watch a horror movie you probably shouldn't let them play this game.
Fans of first-person-shooters can consider F.E.A.R. a worthwhile purchase. It delivers a very refined experience and is visually probably one of the best titles out there right now. Plus players get to fight against rather clever enemies without being constantly roflmaoed.
People bored with first-person-shooters might think about giving it a try anyway. F.E.A.R. avoids some of the genre's biggest annoyances. There are no crates, no jumping puzzles, only a few catwalks and the protagonist has hands and feet. If gamers can overcome their initial resentments they might really enjoy this one.
Deaf and Hard of Hearing players should be more than happy with the game. Every last bit of in-game dialog is subtitled: even the conversations of enemy soldiers, which give important hints on what is going on around the next corner.