Complete the indicated level to unlock the corresponding music track.

All Egypt music: Complete Temple of Khamoon, Obelisk of Khamoon and the Sanctuary of the Scion.
All Greece music: Complete St. Francis' Folly, Coliseum, Palace Midas and the Tomb of Tihocan.
All Lost Island music: Complete Natla's Mines, The Great Pyramid and The Final Conflict.
All Peru music: Complete Mountain Caves, City of Vilcabamba, The Lost Valley and the Tomb of Qualopec.
Croft Manor music: Complete Croft Manor.