@bdbdbd
The burden of proof falls on you, so for every point you make, i'll need to see some link to a study or something similiar to show they are all acts of maturity. I don't necessarily disagree with some of them, but even that is my own interpretation of maturity, and I wouldn't use to to force a type of game into meeting those criteria. Also what exactly makes 30 the year one hits maturity? Brain functions, as you stated mature around 25, and sexual maturity(which is what most species are graded on in terms of reaching maturity) is around the ages of 12-15. What level of maturity is reached at the age of 30?
Right here i'll break down each point you made on a mature game and it's qualifications:
It needs to be simple and fast to learn, so you could play it (sophistication).
-The word sophistication does not match the sentence that precedes it. If anything sophistication would mean complex, not simple. Here's the third definition ripped straight from Merriam-Webster "the process or result of becoming more complex, developed, or subtle". FYI, the other two definitions don't support that sentence any better.
Now moving onto the sentence itself, it doesn't make a lot of sense to assume a simple and fast to learn game would be considered mature, when one of the most popular games for adults is chess and if any game on this world were to ever be considered mature, it would surely be chess. It took me one hour to get good at Gears of War. I still suck at chess after having played it on and off for the last 10 years.
It can't be graphically too intense (detailed), so that the visuals don't stress the brains too much.
-You're going to have to give me a legitimate study to back this claim up because at this very moment I'm finding it hard to believe an adult's brain would get stressed trying to play a graphically intense game. You also haven't given any point ro prove what qualifies a game as graphically intense. Wii Sports is graphically intense in comparison to an Atari 2600 game is it not? Without a common relateable standard it's impossible to say what is or isn't graphically intense.
It needs to be fun.
-"Fun" is relative to the person that plays the game. You cannot just say one game is fun and not another. This would qualify any game to be mature, because any game could be fun in theory to at least one mature person.
I can't be too fast or a reflex test.
-I'm not sure what this has to do with maturity. Also just to point out, your three previous examples of mature games, the Wii series all have fast gameplay and require reflexes at various times, disqualifying all of them. Note: I haven't played Wii Fit yet, so this applies primarily to Wii Play and Wii Sports. From videos i've seen of Wii Fit, it looks like it does contain those attibutes though.
It has to be playable in short bursts.
-All games are playable in short bursts. If what you mean is a game that is designed in nature to be played in short bursts, then there are a shitload more games than just the Wii series that qualify.
It needs to focus on gameplay.
-What game doesn't focus on gameplay? The only ones I can think of are Dragon's Lair and Time Traveller.
Just to let you know, it doesn't look like you explained one iota what a mature game would be like, but you somehow perfectly explained the mentality of arcade cabinet games. So basically a mature game is an arcade game? I suppose then NFL Blitz '99, House of the Dead 4 and Daytona USA would be the most mature games of all huh? Good point. I love arcades, so I suppose I'm a mature gamer.