According to the ESRB, this game contains: Blood, Intense Violence, Partial Nudity, Strong Language
Parents will want to use their better judgment. This game features fairly realistic combat against other human beings, employing all sorts of firearms and explosives. There are also a small number of scenes that could be seen as somewhat graphic, and the language can get a bit salty at times with expletives being used, although I will say that they are used in the appropriate places and not excessively. There is no sexual content, but it's pretty clear that the rest of the game is aimed at a mature audience.
Action gamers on the PSP just hit the mother lode. This is easily one of the best games on PSP, period, and rockets to the top of the genre overall. The action is tight, the story keeps it moving, and there's a ton of quality work put into the graphics and presentation. Sony Bend has done an outstanding job, and should be proud that their adventure can be considered in the same class as a Splinter Cell or Metal Gear.
Deaf and Hard of Hearing gamers should be aware that the game provides subtitles for all important dialogue and cutscenes, always appreciated. There is a wealth of visual information available on screen including a map that highlights nearby enemies, but it should be noted that audio cues sometimes play an important role. It often helps to be able to hear enemies talking, or the sound of their footsteps in the distance.