Hmm, I stumbled upon a new game called Age of Empires Online that I haven't played before...
I'm a fan of the series, so I downloaded it (it's free), and it's actually pretty fun! I recommend trying it out.
Age of Empires Online on IGN
I haven't gotten very far into the game, just a few tutorials, haven't really reached the online part, though I have seen a few pop ups asking me if I wanted to team up with a buddy...
Good first impression, will post more when I get further into the game.
