In 'Whose Shadow Is That?', players assume the role of a quirky detective in a city where shadows have minds of their own. As they navigate through dark alleys and illuminated rooftops, they interact with eccentric NPCs who have swapped their secrets for shadows—each harboring hints to unravel a larger mystery. Players must use keen observational skills to decipher the intentions of various shadows while dodging shadowy figures intent on keeping the truth hidden. Choices affect the story's direction, allowing players to uncover multiple endings based on their detective skills and shadow interactions.