| Countries of the World Quiz | 0 | - | 5.00 | 47,950,684 |
| Landlocked Countries | 0 | - | 4.99 | 427,012 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,810,676 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,800 |
| Himalayan Countries | 0 | - | 4.93 | 140,721 |
| Andean Countries | 0 | - | 4.94 | 85,747 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,872 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,417 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,430 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,647 |
| Danube Countries | 0 | - | 4.97 | 72,522 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,749 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,946 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,389 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,851 |
| European Landlocked Countries | 0 | - | 4.99 | 147,713 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,493 |
| Countries with the Most Species | 0 | - | 4.99 | 103,630 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,600 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,805 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,939 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,905 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,662 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,112 |
| Countries in the Alps | 0 | - | 4.87 | 118,936 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,930 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,074 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,045 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,147 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,096 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,365 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,552 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,974 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,498 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,291 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,943 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,818 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,656 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,904 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,999 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,093 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,705 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,241 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,809 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,191 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,424 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,597 |
| Largest Countries By Category | 0 | - | 4.97 | 159,045 |
| Countries by Countries | 0 | - | 4.97 | 63,786 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,396 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,440 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,701 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,521 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,199 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,368 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,981 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,216 |
| Island Countries | 0 | - | 4.99 | 712,911 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,866 |
| Northernmost Countries | 0 | - | 4.99 | 364,477 |
| Countries of South America | 0 | - | 5.00 | 933,944 |
| Countries of Oceania | 0 | - | 5.00 | 1,065,016 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,892,188 |
| "Land" Countries | 0 | - | 4.98 | 338,897 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,396,300 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,436 |
| Countries with Megacities | 0 | - | 4.99 | 267,705 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,086 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,295 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,422 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,405 |
| Countries by Official Language | 0 | - | 4.95 | 196,170 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,877 |
| Countries in their Native Language | 0 | - | 4.99 | 199,918 |
| Independence from Whom | 0 | - | 4.99 | 213,347 |
| Subdivisions by Country | 0 | - | 4.87 | 50,653 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,620 |
| Megadiverse Countries | 0 | - | 4.96 | 148,209 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,099 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,569 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,785 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,250 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,431 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,912 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,247 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,610 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,147 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,281 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,717 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,468 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,494 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,203 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,623 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,951 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,658 |
| World Map Quiz | 0 | - | 4.81 | 65,896 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,763 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,782 |
| Countries by Founding Story | 0 | - | 4.95 | 77,895 |
| Countries by Road Signs | 0 | - | 4.98 | 54,428 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,450 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,204 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,674 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,858 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,529 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,639 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,832 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,755 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,915 |
| Widest Countries East to West | 0 | - | 4.92 | 130,817 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,624 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,362 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,549 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,139 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,078 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,591 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,526 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,916 |
| Countries with Double Letters | 0 | - | 4.96 | 97,533 |
| Countries that End in N | 0 | - | 4.95 | 172,561 |
| Countries with Five Letters | 0 | - | 4.96 | 284,536 |
| Countries with Six Letters | 0 | - | 4.94 | 214,881 |
| Countries with W | 0 | - | 4.96 | 161,261 |
| Countries with Z | 0 | - | 4.98 | 292,910 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,623 |
| Countries That End in U | 0 | - | 4.95 | 121,360 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,372 |
| Countries that End in O | 0 | - | 4.92 | 160,351 |
| Countries that End in R | 0 | - | 4.87 | 119,262 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,045 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,091 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 184,472 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,129 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,628 |
| Countries That End in Y | 0 | - | 4.91 | 186,158 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,146 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,388 |
| Countries that End in I | 0 | - | 4.94 | 135,406 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,170 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,126 |
| Countries That End in NIA | 0 | - | 4.92 | 110,140 |
| Countries That End in BIA | 0 | - | 4.93 | 149,710 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,906 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,874 |
| Countries That End in RIA | 0 | - | 4.93 | 127,126 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,518 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,884 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,347 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,810 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,362 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,901 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,427 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,592 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,029 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,721 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,876 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,572 |
| Countries that End in L | 0 | - | 4.94 | 157,226 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,467 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,373 |
| City to Country Quiz #1 | 0 | - | 4.96 | 157,863 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,144 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,529 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,614 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,276 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,508 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,391 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,155 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,303 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,290 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,968 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,870 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,340 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,657 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,873 |
| One Border Countries | 0 | - | 4.98 | 472,434 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,852,087 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,658,325 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,743 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,437 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,469 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,788 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,976 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,335 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,698 |
| Countries by National Anthem | 0 | - | 4.92 | 71,430 |
| NATO Countries | 0 | - | 4.98 | 283,878 |
| EU Countries Quiz | 0 | - | 4.99 | 278,744 |
| Recently Independent Countries | 0 | - | 4.98 | 160,479 |
| French-Speaking Countries | 0 | - | 4.85 | 271,839 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,220 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,126 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,788 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,535 |
| German-Speaking Countries | 0 | - | 4.92 | 146,074 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,733 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,849 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 168,620 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,714 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,778 |
