| Countries of Europe Quiz | 0 | - | 5.00 | 3,760,553 |
| Countries of South America | 0 | - | 5.00 | 923,757 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,213 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,868,462 |
| Landlocked Countries | 0 | - | 4.99 | 419,515 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,377,898 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,230 |
| Himalayan Countries | 0 | - | 4.95 | 137,672 |
| Andean Countries | 0 | - | 4.95 | 84,063 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,308 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,813 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,930 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,423 |
| Danube Countries | 0 | - | 4.97 | 71,724 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,643 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,119 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,752 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,830 |
| European Landlocked Countries | 0 | - | 4.99 | 146,840 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,209 |
| Countries with the Most Species | 0 | - | 4.99 | 102,984 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,368 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,449 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,611 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,351 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,027 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,419 |
| Countries in the Alps | 0 | - | 4.87 | 117,781 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,201 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,488 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,456 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,105 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,166 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,760 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,353 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,248 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,007 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,605 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,514 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,363 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,972 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,240 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,261 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,298 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,098 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,605 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,631 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,632 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,368 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,031 |
| Largest Countries By Category | 0 | - | 4.97 | 157,749 |
| Countries by Countries | 0 | - | 4.96 | 62,905 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,294 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,173 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,482 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,386 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,500 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,760 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,463 |
| Island Countries | 0 | - | 4.99 | 710,009 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,697 |
| Northernmost Countries | 0 | - | 4.99 | 360,755 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,683 |
| "Land" Countries | 0 | - | 4.98 | 335,939 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,046 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,192 |
| Countries with Megacities | 0 | - | 4.99 | 261,985 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,044 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,085 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,343 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,124 |
| Countries by Official Language | 0 | - | 4.95 | 194,753 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,688 |
| Countries in their Native Language | 0 | - | 4.99 | 198,294 |
| Independence from Whom | 0 | - | 4.99 | 211,472 |
| Subdivisions by Country | 0 | - | 4.86 | 50,313 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,816 |
| Megadiverse Countries | 0 | - | 4.96 | 134,805 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,626 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,212 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,784 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,032 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,774 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,418 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,061 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,878 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,520 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,009 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,119 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,747 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,024 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,812 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,184 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,360 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,356 |
| World Map Quiz | 0 | - | 4.81 | 64,690 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,871 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,088 |
| Countries by Founding Story | 0 | - | 4.95 | 77,120 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,635 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,002 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,721 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,508 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,596 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,742 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,883 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,302 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,338 |
| Widest Countries East to West | 0 | - | 4.92 | 129,422 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,401 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,020 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,017 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,562 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,290 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,610 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,264 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,736 |
| Countries with Double Letters | 0 | - | 4.97 | 95,181 |
| Countries that End in N | 0 | - | 4.95 | 170,182 |
| Countries with Five Letters | 0 | - | 4.96 | 280,821 |
| Countries with Six Letters | 0 | - | 4.94 | 212,618 |
| Countries with W | 0 | - | 4.97 | 159,587 |
| Countries with Z | 0 | - | 4.98 | 289,999 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,823 |
| Countries That End in U | 0 | - | 4.95 | 120,443 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,838 |
| Countries that End in O | 0 | - | 4.92 | 159,230 |
| Countries that End in R | 0 | - | 4.87 | 118,757 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,536 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,437 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,186 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,133 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,731 |
| Countries That End in Y | 0 | - | 4.91 | 185,670 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,340 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,496 |
| Countries that End in I | 0 | - | 4.94 | 134,902 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,235 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,608 |
| Countries That End in NIA | 0 | - | 4.92 | 109,547 |
| Countries That End in BIA | 0 | - | 4.93 | 148,895 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,785 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,113 |
| Countries That End in RIA | 0 | - | 4.93 | 126,572 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,700 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,860 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,302 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,686 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,213 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,366 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,727 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,291 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,195 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,230 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,901 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,609 |
| Countries that End in L | 0 | - | 4.94 | 156,578 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,289 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,164 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,869 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,764 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,810 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,891 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,258 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,696 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,203 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,694 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,629 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,977 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,612 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,705 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,167 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,928 |
| One Border Countries | 0 | - | 4.98 | 467,998 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,824,858 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,618,060 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,610 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,548 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,752 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,320 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,441 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,991 |
| Countries by National Anthem | 0 | - | 4.92 | 71,202 |
| NATO Countries | 0 | - | 4.98 | 279,647 |
| EU Countries Quiz | 0 | - | 4.99 | 273,306 |
| Recently Independent Countries | 0 | - | 4.98 | 159,090 |
| French-Speaking Countries | 0 | - | 4.85 | 270,316 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,778 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,734 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,765 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,338 |
| German-Speaking Countries | 0 | - | 4.91 | 145,415 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,721 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,093 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,377 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,970 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,037 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,447 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,691 |
| Olympic Host Countries | 0 | - | 4.98 | 200,541 |
