According to ESRB, this game contains: Animated Blood, Animated Violence
Parents should also be aware the game is rated 'mature.' While there's a heavy amount of R-rated blood splattering, I wouldn't really describe the game as being over-the-top. The realistic reactions of computer enemies being shot in particular parts of their bodies (particularly in the neck and head) can be rather intense, but outside of that and the blood splatter, Perfect Dark keeps things rather clean in terms of language and sex.
Fans of GoldenEye 007 and first person shooters who are expecting something revolutionary will probably feel a bit disappointed. For all the new weapons, features, and modes, Perfect Dark doesn't have a very original storyline and doesn't play all that different from its predecessor. Those same fans who aren't as concerned about innovation and would be more than happy with a large-scale update to GoldenEye will find Perfect Dark to be heaven-sent. The new missions on their highest level of difficulty are every bit as challenging as the ones in GoldenEye.
For multiplayer fans, Perfect Dark is about as 'perfect' as multiplayer gaming will ever get on the Nintendo 64. The sheer amount of scenarios and new options like being able to include up to eight Simulants, makes the game a must-own for those who like to crowd around the couch.
Casual gamers may be put off by the elaborate controls, the complex mission objectives, and the lack of a map feature to help navigate through the lengthy stages. Make no mistake; Perfect Dark is strictly for the hardcore.