This category contains all major songs from the Ar tonelico and Surge Concerto series. Remember you need to have installed the Hymmnos and Ar Ciela fonts, as well as the unofficial Emotional Song Pact font to be able to see the glyphs in most of the articles. Otherwise, you will only see these lines written in normal letters.

Also, most of the articles will have a "Feelings Contained in This Song" section, which will show what was the basis from which all of the artists involved in the project created the melodies and lyrics that give form to that particular song.