Asheron's Call has put childish things behind it and entered the elite realm of MMO teenagers. Turbine's oldest title is celebrating its 13th anniversary today. "A huge thanks to our community for sticking with us through the years. AC is older than children!" the Turbine feed said.
Asheron's Call released on November 2nd, 1999. It was originally published by Microsoft until 2004, when Turbine (which developed the title) purchased the rights. According to the forums, the team is still chugging forward despite recent Turbine layoffs, and there's a February update in the making.
You can read Massively's history of Asheron's Call in our Game Archaeologist column.