Mapnesia is a free online geography game that tests users' knowledge of world countries, capitals, flags, and other geographic features. The primary function of the application is to present a series of interactive quizzes where users identify locations on a map, match flags to countries, recognize capitals, and solve puzzles based on land borders and flag color proportions. The platform also includes language games and allows users to explore anonymous game statistics. The application offers a variety of quiz modes. Users can click on a named country on the map, choose the name of a highlighted country, or identify seas, oceans, bays, and gulfs. Other modes challenge users to cross as few land borders as possible while staying on connected land, find a country from the flags of all its land neighbors, or select the complete set of neighbor flags. Flag-related quizzes include matching a flag to a country, identifying a country from a pie chart of its flag's color proportions, and recognizing a country from a colorless outline of its flag. Capital quizzes ask users to choose the country of a named capital or pin a capital on the map, with the distance from the correct location displayed. Typical use cases include self-directed learning for students, casual geography enthusiasts, or anyone looking to improve their knowledge of world geography. The workflow involves selecting a quiz type, answering questions by clicking or typing, and receiving immediate feedback. The platform is accessible via a web browser at mapnesia.com and does not require registration or payment. Technical requirements are minimal, as the application runs entirely in a standard web browser with no additional software needed.