| Countries of the World Quiz | 47,444,174 | 0 | - |
| World Capitals Quiz | 5,072,520 | 0 | - |
| U.S. Presidents Quiz | 3,698,045 | 0 | - |
| Countries in World War I | 228,118 | 0 | - |
| Countries in World War II | 912,566 | 0 | - |
| Axis Occupied Countries of WWII | 228,991 | 0 | - |
| Modern-Day Axis-Occupied Countries of WWII on a Map | 85,873 | 0 | - |
| Cities Controlled by the Axis - Sudden Death | 80,696 | 0 | - |
| WWII Geography | 120,329 | 0 | - |
| Click Timeline: World War II Events | 5,779 | - | - |
| Countries Where a Nuclear Weapon Has Exploded | 54,963 | 0 | - |
| NATO Members - Sudden Death | 150,383 | 0 | - |
| Major non-NATO U.S. Allies | 52,184 | 0 | - |
| Elements of the Periodic Table | 2,242,389 | 0 | - |
| Countries with the Most Airports | 98,840 | 0 | - |
| Digits of Pi | 1,162,839 | 0 | - |
| All 3,143 Counties of the United States on a Map | 331,917 | 0 | - |
| All Counties of the United States by Proximity | 307,303 | 0 | - |
| Top 10 Most German U.S. States | 59,968 | 0 | - |
| All Country Flags of the World | 3,662,820 | 0 | - |
| Super Bowl Winners - Sudden Death | 38,684 | 0 | - |
| Flags of Island Countries - Sudden Death | 111,592 | 0 | - |
| Countries that Use the Euro - Sudden Death | 250,108 | 0 | - |
| Flags of the Mediterranean | 148,538 | 0 | - |
| Similar Flags #1 | 130,009 | 0 | - |
| Similar Flags #2 | 137,292 | 0 | - |
| Biggest City in Each Risk Territory | 27,069 | 0 | - |
| Deadliest U.S. Wars | 190,778 | 0 | - |
| U.S. State Flags | 170,373 | 0 | - |
| 20 Random Country Flags | 612,214 | 0 | - |
| Africa Flags Map Quiz | 36,439 | 0 | - |
| U.S. State Capitals Quiz | 1,689,440 | 0 | - |
| Cities in the Minneapolis Metro Area on a Map | 571 | - | - |
