No, what they need to do is label this game 18 or whatever, and sell it in the same sections of the store where they sell or rent adult porn.
Think of this: how come they can sell explicit hard-core porn? Aren't they worried kids are going to get access to it? Of course *that* industry is excused from this nonsense
Why are videogames treated more dangerous? That's bull. They should just stick Manhunt 2 in with the other adult movies, then for sure no idiot parents will buy it for their kids.
Of course a kid can still obtain the game secretly, like he could obtain a porno video. Hell, people can still import banned games if they really want to. There's never a 100% way to stop this from getting into a child's hands.