MAP15: Clash of Galaxies is the fifteenth map of Community Chest 3. It was designed by Eric Baker (The Green Herring), and was the author's second completed and published level. It uses the music track "Liberty Through Violence," composed by Baker specifically for the map; the only other level in the megawad with this distinction is MAP27: Ruby Abyss, by the same author. This level contains a secret exit leading to MAP31: Disarming the Mechanism.