The philosophy of Ghost of Tsushima centers on the conflict between honor and pragmatism, specifically the clash between the samurai code of Bushido and the necessity of using "dishonorable" tactics to survive an existential threat. The game's narrative explores how Jin Sakai must abandon his traditional samurai ideals, which prove ineffective against the Mongol invaders, to become the "Ghost" in order to save his homeland. It's a meditation on how morality is tested and redefined in wartime and the sacrifices made for the greater good.