That brings the total down to $40, whereas all other storefronts-Steam, Origin, Amazon, and the Microsoft Store-are selling Final Fantasy XV for its full $50 price tag. Better news! Even though the game only released on Tuesday, Green Man Gaming is already selling Final Fantasy XV Windows Edition for 20 percent off. Good news! The long-awaited Final Fantasy XV PC port runs like a champ, and it looks drop-dead gorgeous.