: Each of the 18 playable nations has unique passive bonuses and units that provide distinct advantages throughout the eight ages of history.
: A defensive feature where enemy units take damage while in your territory unless they bring supply vehicles, giving "turtling" players a natural advantage. Rise of Nations
: Pressing the Tab key allows you to quickly cycle through all available technologies, making it much easier to keep up with research. : Each of the 18 playable nations has