Regarding six, no thank you. That's not what I'm looking for in a game like this. Also, foul language is quite unnecessary, I'd rather see the NPCs to use words like N'wah, S'wit, Criminal Scum, and some other Nordic words :hubbahubba:
This pretty much covers what would make a game M-rated(?), but I'm not sure where a game like this would land? Oh, and I'd love for the game to have a very mature story, with politics, religion, intrigues and so on. But, as far as I'm concerned, that doesn't affect the games age rating, does it?