Complex sentence: The expansion packs were sold in retail and each included 35 new sonss, while the free downloadable add-on came with two Altared Life songs and was released on January 14,2007.
Split into simpler sentences: The expansion packs were sold in retail and each included 35 new songs. A free downloadable add-on was also released; it came with two songs from Altared Life and was released on January 14,2007.