My game is mostly teenagers and... families
It's quite strange when parents/uncles/even teachers are asking kids to play the game with them. I have even seen 70-ty year old players there (but rare). The most weird demographic I ever seen and never expected. I think it's caused mostly by strict no bad language policy and good moderation of all aspects of the game (ranging from usernames, clan descriptions, chat, forum, etc). Also due to strong cheater's hunter team it is allowed to play from the same IP/machine, so many people (siblings) who would be banned on sight in other games are welcomed there. Oh yes, and people from army (don't ask why, maybe because this is the only game they can play on a shared machine?). Mostly everyone, but teenegers (while still the biggest group) are smaller than expected.
When I was designing it I didn't have any specific age on my mind, just "people who don't have much time to play, like social interaction, hate micromanagement and like making strategic choices".
