Europa Universalis IV: El Dorado Content Pack includes two new unit packs and a music pack to add to the El Dorado expansion. South American Unit Pack - This unit pack adds twelve new unit models for South American and Andean natives, including Inca, Mapuche and Tupinamba. Mesoamerican Unit Pack - This unit pack adds twelve new unit models for Mesoamerican natives, including Aztec, Maya and Mixtec. Songs of Exploration - This music pack adds five new songs, inspired by the Age of Exploration. These new songs will play during peacetime as colonies are established in the newly discovered lands.