Major Boss Battle

 is a track in Xenosaga Episode II. It has not been released on any soundtrack or sound selection and not much is known about this track.

It plays during the following battles:
 * during the prologue.
 * and on Second Miltia.
 * in MOMO's subconscious domain during the winter.
 * in the Ormus Stronghold.
 * in Labyrinthos.
 * in the Omega System.
 * Dark Erde Kaiser in the Space Coliseum.
 * Phobos Rigas in the Dämmerung.
 * Baal Zebul in Old Miltia.
 * Mikumari in the Desert.