Great expansion pack to a great sequel. Best strategy game ever.
RTW combine real time strategy with turn based game like civiization.
After you move your armies on the turn based map of europe, you will go into a real time map and there you will fight with hundreds or thousends of soliders.
The barbarian invasion add a few good improvment to almost perfect game.
You can choose to play number of barbarian tribes or trying to save whats left of the roman empire by either playing with the westren or the eastren empire.
There are many new units in the game and one of the most important one is the horse archer that have the abillity of firing archers and than run quickly (Its a very powerful unit that alomost have no competetors).
There is also the new elemnt of relilgion in the game but it's less important and have little impact on the game.
The diffuclty is very hard, espaiclly when playing with the roman but with huns and others as well.
Another thing that need improvemnt and fast is the economy system in your cities that will broke you and eventually make you loss the game.
The graphics are well and the sound is really nice too.
Overall this is a must have game in every respectble house with gamers from 6 to 90.