Bionis is a colossal, living entity featured in the video game series Xenoblade Chronicles. It serves as the primary setting for the game, where players explore its vast landscapes, which include forests, mountains, and ruins. Bionis is depicted as a titan that houses various ecosystems and civilizations on its body. In the game's lore, Bionis is engaged in an eternal conflict with another titan called Mechonis. This struggle shapes the world and its inhabitants, influencing their cultures and histories. Players navigate this rich environment, uncovering secrets and battling foes while learning about the relationship between Bionis and Mechonis.