For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.
Main Theme (メインテーマ) is an Event Track in Xenoblade Chronicles, composed and arranged by Yoko Shimomura, with additional string arrangement by Tsutomu Narita. It is track 1 of disc 1 from the Xenoblade Original Soundtrack and track 1 on the Xenoblade Chronicles Special Soundtrack. This music serves as the Title Screen (and menu) music for the game. Outside of that, it plays in only one cutscene, specifically when Face Nemesis is unmasked as Fiora at Prison Island, revealing to Shulk and his companions that she was alive all along.
The Live Recording is an official live performance of five songs from Xenoblade Chronicles to celebrate the release of Xenoblade Chronicles 3D. These songs were performed and orchestrated by ACE+ band accompanied by a string quartet, in particular the live recording of Main Theme.