I imagine it will be rated 18, not that it makes any difference. Parents will buy anything for their children as far as computer games go, just to keep them quiet.
I saw some very young children (8-12) buying games in Game store. A handful of games for PS4, a hundred pounds and no checking of ages. On another note, I bought a piates game for the WII for the wife, rated 3+, and went through the self service at Sainsbury's. I had to wait for age verification. Go figure.
And in answer to your question - yes, too violent.
