But if the definition of a mature game depends on who should be allowed to play it (that is what you've said), would that rule out non M-rated games altogether? Because a game that doesn't have much, if any, mature content could be played by younger, less mature players... even if they are not the target audience. Or do you see my point of view- that a "mature" game is not so easily defined?

A game doesn't have to be Rated-M to appeal to an older audience. Just look at Angry Birds....it appeals to people of all ages.

Maturity isn't easily defined. What I said, though, would easily take out non-mature people.

Unless you can describe to me a system in which it would, I don't see how.

Actually, if a game's target audience was made clear to retailers, and perhaps even printed on the box, a lot problems could be avoided. But I don't think the current ratings system does this adaquately... or is even meant for such a purpose.

@ VGKing

You misunderstand me. I said solely to an older audience. Angry Birds appeals to a wider demographic.

Kirby doesn't wear clothing and he devours opponents, presumably ending their lives.

Methinks "Mature" is an arbitrary label.

A game that has mature content.

Exactly. That's why we're discussing "mature" as being based on the intended audience... which is bringing up some actually interesting points of discussion.

@ Rol

Rated T for teenage boy.

In that case, the list of mature games is very, very long. Unless, of course, you could provide specific examples of what counts as mature content.

A game that's rated M for Mature and a game that actually is 'mature' are not necessarily the same thing.  Let me give three examples:

1. Gears of War: It is M-rated, but it is most certainly NOT mature.  It is a bunch of meatheads running around and shooting aliens, with the occasional wife dying to make it look 'deep'.  You have to BE mature in order for it to be suitable for you to see.

2. Heavy Rain: It is dark and suspenseful, and deals with biting themes of wanting to protect one's children and the deep psychological scars that can be induced by poor parenting.  This is an M-rated game that is certainly mature.  

3. Majora's Mask: An E-for-Everyone-rated title that is certainly mature.  Its content is certainly suitable for a younger audience, but it's not shy about the fact that its main themes center around misguided youth and impending doom.

So, we need to clearly define what 'mature' actually means here.

You could have seperate definitions of 'mature game'. Or perhaps we could come up with a better name for each definition, just to erase any and all confusion.