According to ESRB, this game contains: Blood, Language, Violence
Parents have relatively little to be concerned about. While the game is certainly not for children, it's not overtly gory or filled with gratuitous profanity. Despite its M rating, its content is on par with a typical PG-13 movie. For those who are religiously inclined, the theme of doing the Devil's bidding may be objectionable, but it's done in a pretty generic and superficial way.
PC gamers and shooting fans may enjoy this game simply as filler while they wait for the next big blockbuster to hit the shelves. So if you've just finished BioShock and are anxiously awaiting Crysis, it might be worth it to grab this third-person shooter just for a quick weekend of blowing stuff up.
Fans of Winback might enjoy the very similar gameplay here, with its use of a simple cover system and straight-up arcade style action. Perhaps the only drawback here is that the game feels like it was released around the same time as Winback, albeit with a shinier coat of paint.
Deaf and Hard of Hearing gamers have little to miss; subtitles can be enabled for the dialogue, and there are few essential audio cues in the gameplay.