Yes, you can, you must win them in war....
complete campaign as the first three roman factions.
In order to unlock the other factions, you must complete campaign for one of the starting factions : Julii, Scipii, and Brutii
No but there is another way
Sorry there is no alien invasion
Playing out campaings.
in data there is not world,why
Playing out campaings.
Yes, you can play almost all the factions when you complete the grand campain. The only exseptions is the India factions, and the two invading. (mongols and someone else)
Win the game or destroy the desired faction
That's a complete invasion of privacy!!
You can't anymore.
Yes but only if you modify the files. Its really easy. Go to youtube and search how to unlock all factions. That will show you how.