Don Quixote A Geocaching Windmill Quest is a multiplayer mobile app scavenger hunt game where players work together in teams to locate virtual windmills at real-world geographic locations by purchasing clues and chatting within the app. Players take on roles as characters from the story of Don Quixote such as Don Quixote himself or his horse Rocinante, and find windmills by answering location-specific questions correctly to unlock treasures and immediately continue playing in a different role.