http://www.bigfishgames.com/blog/2013-gamers-survey-results-demographics-platforms-and-smartphone-use/
So I found this data set on the demographics of 1000 gamers that took the survey. The median age range was 25-34. 8% of the survey takers where over the age of 55. 66% of responders where women. Males accounted for 33%. 46% of responders where married but a lot of the responders where single. 86% of the players attended collage. 53% have no children. 64% have a job. And this places most of the gamers firmly in middle class. Most of the survey takers live in the northereaster U.S. A possible reason for this distribution is because of the cold weather keeping them inside.
Other Data sources for the site
The average gamer is 30 years old and has been playing for 13 years. 68% of gamers are 18 or older.
45% percent of all players are women. Today, adult women represent a greater portion of the game-playing population (31%) than boys age 17 or younger (19%).
62% percent of gamers play games with others, either in-person or online. Seventy-seven percent of these gamers play with others at least one hour per week.
53% of Americans play video games.
This survey was a involuntary response because its a servey that you can click on the side of a website or a email would get sent to you.
Some of the influencing actors might be some bias because only gamers are taking the survey and half of the population was woman. There could be some privacy influencing because its asking you a lot of private question like “How old are you” or “are you married” and some people can be uncomfortable putting that on the internet.