Alrest (Japanese: アルスト, Arusuto) is the setting of Xenoblade Chronicles 2. It is the name of the world overrun by a sea of clouds where Titans live. Each Titan hosts its own distinct civilizations, cultures, wildlife, and environments. The Titans march toward death and the world of Alrest is disappearing. The heroes try to save the world of Alrest by demystifying its cloudy past.