Barbarian Invasion is an expansion for the PC game Rome: Total War which takes the action forward to the period of the decline of the Western Roman Empire. The campaign begins in 363 A.D. and ends in 476 A.D. If the player has not achieved his or her campaign goals in 476, he/she can either choose to quit or to play on and dominate the campaign map entirely. The expansion includes simulation of the religious tension of the period, as three major religions (Christianity, Zoroastrianism and Paganism) fought for dominance. Also depicted are the great migrations of the Germanic and steppe peoples (notably the Huns) throughout Europe.