Personally I don't think it matters, it matters what your maturity level is,yes, but not your age. I am all up for a 8 year old to play this game if they have the maturity of say.... +13 years, when they know how to actually understand the game, know how to interact with players normally, and don't swear/spam (because if you swear/spam for the fun of it you really need to get a life) ingame and giggle to themselves. Even though I am pretty sure an 8 year old would give up with this game for the lack of 'action' and not understanding it. So the 8 year old is completely hypothetical. But if that 8 year old is super intelligent/mature why not?
It really matters on what age you grow out of games in which all you do is smash buttons on the ps2,wii ect.(though Wii is fun sometimes)
So yeah I would say 13+ (Or basically once you have passed puberty)
I also think there is a limit to the ages where it just becomes a bit sad(unless you help in developing this game or have somesort of involvement with the gaming industry) but I don't want to offend anyone so i will keep that to myself.
(Edit: I am sorry if I offended anyone by this comment, I was really thinking about( I heard this on the news) people who don't spend time with their children and play on wow(hypothetical example) instead, so your sterotypical 30+ nerd(or any age, but you can't have a go at a 13 year old for playing obssesively but you can have a go at someone my age), and no I am not saying you should not play this game if you are 30+, just not obssesivly.)

In fact, I would think it's a great way for people who have jobs and family commitments to just step out of the every day grind of life now and then. I don't see that as sad, it sounds quite normal. Or do you believe everybody over the age of say 30 should just crawl into a grave and die? lol
