| Countries of Europe Quiz | 0 | - | 5.00 | 3,766,882 |
| Countries of South America | 0 | - | 5.00 | 924,952 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,854 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,871,589 |
| Landlocked Countries | 0 | - | 4.99 | 420,407 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,450,817 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,658 |
| Himalayan Countries | 0 | - | 4.95 | 138,054 |
| Andean Countries | 0 | - | 4.95 | 84,245 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,467 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,297 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,102 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,547 |
| Danube Countries | 0 | - | 4.97 | 71,821 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,771 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,216 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,949 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,391 |
| European Landlocked Countries | 0 | - | 4.99 | 146,954 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,360 |
| Countries with the Most Species | 0 | - | 4.99 | 103,077 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,520 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,496 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,656 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,434 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,112 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,498 |
| Countries in the Alps | 0 | - | 4.87 | 117,948 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,199 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,675 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,542 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,439 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,293 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,828 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,458 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,329 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,068 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,698 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,561 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,417 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,062 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,341 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,354 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,500 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,172 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,683 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,799 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,118 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,636 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,102 |
| Largest Countries By Category | 0 | - | 4.97 | 157,909 |
| Countries by Countries | 0 | - | 4.97 | 63,002 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,449 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,213 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,505 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,493 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,203 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,015 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,170 |
| Island Countries | 0 | - | 4.99 | 710,349 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,047,741 |
| Northernmost Countries | 0 | - | 4.99 | 361,181 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,023,165 |
| "Land" Countries | 0 | - | 4.98 | 336,212 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,379,392 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,440 |
| Countries with Megacities | 0 | - | 4.99 | 263,306 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,279 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,231 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,576 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,270 |
| Countries by Official Language | 0 | - | 4.95 | 194,919 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,930 |
| Countries in their Native Language | 0 | - | 4.99 | 198,444 |
| Independence from Whom | 0 | - | 4.99 | 211,689 |
| Subdivisions by Country | 0 | - | 4.86 | 50,357 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,968 |
| Megadiverse Countries | 0 | - | 4.96 | 134,872 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,777 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,252 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,841 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,058 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,898 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,473 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,205 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,933 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,559 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,038 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,325 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,789 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,089 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,863 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,251 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,410 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,636 |
| World Map Quiz | 0 | - | 4.81 | 64,847 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,369 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,183 |
| Countries by Founding Story | 0 | - | 4.95 | 77,210 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,769 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,082 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,821 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,750 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,707 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,840 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,002 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,347 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,424 |
| Widest Countries East to West | 0 | - | 4.92 | 129,493 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,415 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,156 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,059 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,634 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,402 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,696 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,307 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,763 |
| Countries with Double Letters | 0 | - | 4.97 | 95,379 |
| Countries that End in N | 0 | - | 4.95 | 170,412 |
| Countries with Five Letters | 0 | - | 4.96 | 281,335 |
| Countries with Six Letters | 0 | - | 4.94 | 212,829 |
| Countries with W | 0 | - | 4.97 | 159,724 |
| Countries with Z | 0 | - | 4.98 | 290,633 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,981 |
| Countries That End in U | 0 | - | 4.95 | 120,522 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,003 |
| Countries that End in O | 0 | - | 4.92 | 159,291 |
| Countries that End in R | 0 | - | 4.87 | 118,808 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,576 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,607 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,327 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,221 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,832 |
| Countries That End in Y | 0 | - | 4.91 | 185,728 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,535 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,605 |
| Countries that End in I | 0 | - | 4.94 | 134,957 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,728 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,671 |
| Countries That End in NIA | 0 | - | 4.92 | 109,629 |
| Countries That End in BIA | 0 | - | 4.93 | 148,983 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,882 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,208 |
| Countries That End in RIA | 0 | - | 4.93 | 126,649 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,777 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,098 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,414 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,805 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,341 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,415 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,801 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,358 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,299 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,288 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,001 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,717 |
| Countries that End in L | 0 | - | 4.94 | 156,658 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,783 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,191 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,910 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,824 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,875 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,419 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,397 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,808 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,331 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,838 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,712 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,017 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,642 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,760 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,540 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,302 |
| One Border Countries | 0 | - | 4.98 | 468,558 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,828,641 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,622,635 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,714 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,783 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,891 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,390 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,531 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,075 |
| Countries by National Anthem | 0 | - | 4.93 | 71,235 |
| NATO Countries | 0 | - | 4.98 | 280,344 |
| EU Countries Quiz | 0 | - | 4.99 | 274,177 |
| Recently Independent Countries | 0 | - | 4.98 | 159,225 |
| French-Speaking Countries | 0 | - | 4.85 | 270,488 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,822 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,019 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 288,319 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 273,117 |
| German-Speaking Countries | 0 | - | 4.92 | 145,546 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,805 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,164 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,715 |
| Top Five Countries by Religion | 0 | - | 4.93 | 171,411 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,349 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,596 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,834 |
| Olympic Host Countries | 0 | - | 4.98 | 200,721 |
