Ok, so a year late to the party, but I just found this article now and would like to add something.
I think we should apply their system to the Bible. I haven't read the entire Bible, but I think I'm as familiar with it as they would be with the games they judged. Let's see how it would rate, shall we?
Sex: 2 - Although not always explicit, there are frequent mentions of sodomy, rape, and many husbands "knowing" their wives
Nudity: 1 - Early protagonists Adam and Eve are exhibitionists, but most of the rest of The Bible is nudity-free
Gay/Lesbian: 1 - Never directly mentioned, although there may be homosexual undertones. Lead character Jesus "loves his fellow man" for example.
Violence: 3 - Several gruesome depictions of brutal battles, stonings, tortures and executions, rivers turning to blood, the impending destruction of all life
Cartoon Violence: N/A
Language: 1 - "He who p*sseth against the wall" for example.
Comic Mischief: N/A
Drugs: N/A
Alcohol: 2 - At one point, so desperate for alochol for a feast, the character Jesus is said to "turn water into wine."
Tobacco: N/A
Gambling: 1 - A few references
Demonic: 2 - Some descriptions and references
(Game) Addiction: N/A - Although the Bible has many addicts, few of them spend very much time actually reading it.
Final Rating: 13
This makes The Bible slightly more acceptable than Fallout 3 or Manhunt 2 (both rated 14), but more reproachable than God of War 2 or The Darkness (both rated 11). Make good choices.