User Summary Geo Challenge is a trivia game about geography from the online game publisher Zynga. There are three games: - World Tour (free) - European Tour - USA Tour There are a couple of different levels in the game. For world tour this is: - finding the right flag for each country - finding the right country by looking at the shape - finding the location of a city on a world map - finding the location of a monument on a world map Geo Challenge is part of the Playfish Series. Can only be played on Facebook.