From Robot Entertainment's website:
With more than 20 million copies sold worldwide, the Age of Empires series redefined real-time strategy games for Windows PC players. Now the timeless franchise once again invites players to experience its rich storyline in new ways. Age of Empires Online will invite you to create a living, growing online world, shared with friends and friendly rivals around the globe.
Begin the journey with your own Greek civilization and watch as it progresses from a village to an empire. Embark on quests along the way, alone or with friends, and immerse yourself in epic tales, diverse characters, adventure, history and strategy. Together with the Games for Windows – LIVE service, Age of Empires Online delivers a rich, social experience that lets you play however you want – anywhere, anytime.
Marrying fresh features with iconic gameplay, Age of Empires Online offers something for long-time fans, newcomers, and everyone in between.
Age of Empires Online will feature:
A persistent online capital city that lives and grows even when you’re offline
Cooperative multiplayer quests, trading, and a level-based system that lets you progress at your own pace
Fun, approachable style and storylines
Free to play experiences via Games for Windows – LIVE