The Nomadic Tribes Pack is part of Sega's DLC plans for Rome 2, which will include free and paid content. After Oct. 29, the pack will be sold for $7.99. It features new playable factions like the Royal Scythians, Roxolani and Massagetae. The three new factions come with new buildings and building chains, technology trees, campaign objectives and units.
A trailer for the DLC can be viewed above.