Fun game to play online, currently in beta tho, but still fun.
Here you get the beta key:
http://www.curse.com/keys/age-of-empires-online/default.aspx
Here you get the rest of the instruction how to play it:
http://www.ageofempiresonline.com/beta/
Im playing on Athens server, Live name is AcidSkass if anyone wants to add me as a friend to play co-op.