Not for kids!
My 13 year old has been playing Saints Row 4 -- I knew it would be violent but the parents' ratings said OK for 13, and I'm fine with cartoonish violence now that he's nearly 14. We talk about the violence and I'm comfortable with his level of understanding of the difference between real violence and fake violence in a fantasy setting.
But what I'm not comfortable with is violence combined with gratuitous nudity and sexuality that's clearly meant to titillate. Fine for adults, but not for kids. Grown-ups get the difference between pretend sexuality and real sexuality, but kids don't -- they (hopefully) don't have the real-world experience yet.
I just happened to catch a scene while my son was playing, in which the main character, a nude and shapely woman, is seen from behind, stumbling along a dark passageway, falling against the walls. She bends over (to throw up?) and we zoom in on her butt for a few moments. Hmm. She staggers into a control room, where she is confronted by a beefy stormtrooper-type character, who whacks her in the face with a big gun, knocking her backwards to the floor. She then rolls around on the floor, and we zoom in on her cantaloupe-like breasts bouncing hither and thither. A bit of pixelation has fuzzed her nipples and butt crack, but basically what you have is a 13 year old watching an apparently injured and vulnerable fully naked women getting knocked down by a big burly guy.
You might make the same argument my son made: but the violence is gender neutral! The same thing happens if the main character is a guy! Yes, but the game designers know that the audience is 99% male, and the woman character is made to be extra sexy with lots of opportunities to view her unnaturally curvy body up close as she is being assaulted by oversized male figures. Not a healthy message for a young teen.