In terms of chords and melody, Breach 2015 is more complex than the typical song, having above average scores in Melodic Complexity, Chord-Melody Tension, Chord Progression Novelty and Chord-Bass Melody.
Breach 2015 is written in the key of D Minor. According to the Theorytab database, it is the 4th most popular key among Minor keys and the 10th most popular among all keys. Minor keys, along with major keys, are a common choice for popular music. The three most important chords, built off the 1st, 4th and 5th scale degrees are all minor chords (D minor, G minor, and A minor). See the D Minor Cheat Sheet for popular chords, chord progressions, downloadable midi files and more!