Well, it's marked 12+, so I doubt there would be anything explicit like you describe (I would expedct it to be a 15 or 18 if there was). I haven't played through enough of the game to give you the kind of answer you're looking for, the rating should be a good indicator though.
I go to Greenwich University in London. I'm in the second year of a Computing course which has been good so far.
And my Lionheart progress today:
I've levelled up a couple of times, cleared out the first floor of the Crypt, I'm getting encounters with trios of Greater Skeletons rather than the trio of Revenants so far (I think it depends on the character level before enemies switch- the same seems to apply for Brimstone Soul Reavers becoming Mana Reavers and Ghouls to Huge Ghouls).
I had to retreat a lot to kill many of those Giant Skeletons, once I had one or two to battle, I was able to defeat them, otherwise my character usually ended up dead (unless I used potions extensively anyway). I found a Chain mail of Protection and Fortitude (+11, +19 I think), which seems quite good and now I'll probably go searching stores and decide whether to go to the Caverns next or the next floor of the Crypt.