Top 20 Most Populated Cities in the World

Can you name all the countries that have ever been members of OPEC, the Organization of Petroleum Exporting Countries?

20 random countries have been removed from the map of the world! Can you identify them in 3 minutes?

Click the countries whose flags are have EXACTLY two colors.

Drag the pin onto the correct country. Careful, though! Three wrong moves and the game ends.