According to ESRB, this game contains: Blood, Strong Lyrics, Violence
Parents should be very concerned. This game is extremely violent and is scored to an exceptionally foul-mouthed soundtrack. It should be noted, though, that the foul language is restricted entirely to the soundtrack, and the actual in-game characters are surprisingly reserved in their mode of speech. Interestingly, despite all the violence and foul language, Icon may represent the first time that the videogame version of a real life conflict is actually less violent and obscene than the real world.
Fighting game fans should take advantage of modern videogame systems' reverse-compatibility feature and just buy the earlier games in the series. They'll doubtless find them infinitely more satisfying and just as rappy as this one.
Deaf and Hard of Hearing gamers will be in trouble with this one. As I mentioned in the review, a key element of the game is using the beats of a song to know when and how to beat an opponent. Without the sound all of the game's interactive hazards will prove frustratingly difficult to use—especially when the computer is able to detect exactly when they're going to strike.