The Rock Band Country Track Pack is a standalone software product that allows owners of Rock Band and Rock Band 2, as well as those new to the Rock Band universe to start and keep the party going with an additional 21 seminal hits from the heyday of country rock and beyond that have been hand-picked for players with care by game developer, Harmonix. This track pack is also compatible with most Guitar Hero and other instrument controllers. Key Features: Keep it Going - Enjoy all the great features of Rock Band, including: Solo and Band Tour Mode, Quickplay, Tug of War, Score Duel, and song unlock progression. A Standalone Game - Rock Band Country Track Pack is a standalone game which means that it does not require ownership of Rock Band or Rock Band 2 to play.