We are a fleet that only allows members in their 30's 40's and beyond so we are sort of Mature-ish.. It may be more subjective than the age requirement. Check us out if you qualify by clicking on my signature image.
In invite you to check out the 44th. We are age 18+, casual. Currently relatively small, but rebuilding. Been around since beta with some long-time players with lots of experience. We have TeamSpeak server. Come check us out to see if were a good fit.