| Countries of the World Quiz | 47,863,562 | 0 | - |
| World Capitals Quiz | 5,104,831 | 0 | - |
| U.S. Presidents Quiz | 3,724,955 | 0 | - |
| Countries in World War I | 229,110 | 0 | - |
| Countries in World War II | 918,658 | 0 | - |
| Axis Occupied Countries of WWII | 230,087 | 0 | - |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 86,564 | 0 | - |
| Cities Controlled by the Axis - Sudden Death | 81,923 | 0 | - |
| WWII Geography | 120,959 | 0 | - |
| Click Timeline: World War II Events | 5,990 | - | - |
| Countries Where a Nuclear Weapon Has Exploded | 56,624 | 0 | - |
| NATO Members - Sudden Death | 154,365 | 0 | - |
| Major non-NATO U.S. Allies | 52,515 | 0 | - |
| Elements of the Periodic Table | 2,259,856 | 0 | - |
| Countries with the Most Airports | 100,154 | 0 | - |
| Digits of Pi | 1,166,058 | 0 | - |
| All 3,143 Counties of the United States on a Map | 335,285 | 0 | - |
| All Counties of the United States by Proximity | 309,423 | 0 | - |
| Top 10 Most German U.S. States | 60,263 | 0 | - |
| All Country Flags of the World | 3,711,796 | 0 | - |
| Super Bowl Winners - Sudden Death | 39,522 | 0 | - |
| Flags of Island Countries - Sudden Death | 116,379 | 0 | - |
| Countries that Use the Euro - Sudden Death | 255,568 | 0 | - |
| Flags of the Mediterranean | 149,314 | 0 | - |
| Similar Flags #1 | 130,747 | 0 | - |
| Similar Flags #2 | 138,040 | 0 | - |
| Biggest City in Each Risk Territory | 27,430 | 0 | - |
| Deadliest U.S. Wars | 191,752 | 0 | - |
| U.S. State Flags | 172,860 | 0 | - |
| 20 Random Country Flags | 618,702 | 0 | - |
| Africa Flags Map Quiz | 36,832 | 0 | - |
| U.S. State Capitals Quiz | 1,698,441 | 0 | - |
| Cities in the Minneapolis Metro Area on a Map | 596 | - | - |
