There are 16 games for the whole world, or different parts of the world.
This site also has pages of interactive maps. "(These maps) are all played as games, individually or in a group, competitively or not. Can you point to Zimbabwe on a map of Africa? Do you know where the Vietnam war took place? Can you find the Spice Islands (on a map, not in a boat)? Statetris If you'd rather place countries in the right position using arrow keys, try Statetris. "Statetris is an interesting game mixing aspects of the popular game 'Tetris' and geography. Instead of positioning the typical Tetris blocks, you position states/countries at their proper location." Choose easy, medium or hard levels. Test your Geography Knowledge
A really serious quizz format interactive geography site to test your geography knowledge is at this site. You can test yourself on the whole world, the continents, and some countries.