Crisis

Crisis is Disc 1, Track 8 on the Xenoblade Original Soundtrack. It plays in the following cutscenes:

Xenoblade Chronicles

 * The Mechon begin their assault on Colony 9 (The track continues as the area theme until after is fought; it also plays as the standard battle theme for Mechon in the colony, as well as in the scripted fights at the Central Plaza (before Dunban joins the party) and at the  when Shulk picks up the Monado.)
 * Fiora tells Shulk and Reyn that Dunban is missing in the Mechon assault
 * Mechon surround Shulk, Reyn and Fiora in Colony 9's Central Plaza
 * Xord escapes with Juju on the Bionis' Leg (In the Definitive Edition, no music plays during this cutscene.)
 * Xord and Otharon struggle after the fight in the Ether Mine
 * Melia, Aizel and Hogard fight the Telethia in Makna Forest before she meets Shulk and the others
 * The Mechon appear in Eryth Sea
 * The Mechonis attacks the Bionis while Shulk and the others are at the
 * The party's escape from the Mechonis Core to Junks (as the area theme)
 * The Telethia attack in Colony 6 before Shulk's return
 * Otharon and Juju defend Colony 6 against the Telethia after the party reaches the point of no return on Prison Island

Future Connected

 * The Armus in Gran Dell turn into Fogbeasts and attack the village's inhabitants
 * Fogbeasts from the outside break through the gates of Gran Dell
 * Tyrea gives orders to those defending Gran Dell as the party rushes off to Companions' Cape