| Countries of the World Quiz | 0 | - | 5.00 | 47,926,282 |
| Landlocked Countries | 0 | - | 4.99 | 426,661 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,808,405 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,621 |
| Himalayan Countries | 0 | - | 4.93 | 140,541 |
| Andean Countries | 0 | - | 4.94 | 85,651 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,788 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,269 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,343 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,575 |
| Danube Countries | 0 | - | 4.97 | 72,484 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,703 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,908 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,300 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,753 |
| European Landlocked Countries | 0 | - | 4.99 | 147,683 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,419 |
| Countries with the Most Species | 0 | - | 4.99 | 103,609 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,534 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,794 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,920 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,887 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,628 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,083 |
| Countries in the Alps | 0 | - | 4.87 | 118,873 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,825 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,017 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,017 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,104 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,050 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,332 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,481 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,928 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,476 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,248 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,924 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,796 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,622 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,859 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,958 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,024 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,667 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,772 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,763 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,992 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,328 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,567 |
| Largest Countries By Category | 0 | - | 4.97 | 158,970 |
| Countries by Countries | 0 | - | 4.97 | 63,725 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,347 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,427 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,690 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,483 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,164 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,053 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,882 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,037 |
| Island Countries | 0 | - | 4.99 | 712,786 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,477 |
| Northernmost Countries | 0 | - | 4.99 | 364,325 |
| Countries of South America | 0 | - | 5.00 | 933,516 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,512 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,891,202 |
| "Land" Countries | 0 | - | 4.98 | 338,627 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,455 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,349 |
| Countries with Megacities | 0 | - | 4.99 | 267,512 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,006 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,244 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,338 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,344 |
| Countries by Official Language | 0 | - | 4.95 | 196,131 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,797 |
| Countries in their Native Language | 0 | - | 4.99 | 199,849 |
| Independence from Whom | 0 | - | 4.99 | 213,247 |
| Subdivisions by Country | 0 | - | 4.87 | 50,643 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,570 |
| Megadiverse Countries | 0 | - | 4.96 | 146,060 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,046 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,558 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,759 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,241 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,366 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,894 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,196 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,598 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,129 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,275 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,655 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,441 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,471 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,181 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,610 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,923 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,555 |
| World Map Quiz | 0 | - | 4.81 | 65,843 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,582 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,764 |
| Countries by Founding Story | 0 | - | 4.95 | 77,866 |
| Countries by Road Signs | 0 | - | 4.98 | 54,396 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,393 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,165 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,628 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,751 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,492 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,614 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,798 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,737 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,861 |
| Widest Countries East to West | 0 | - | 4.92 | 130,783 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,619 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,318 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,538 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,106 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,052 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,549 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,519 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,909 |
| Countries with Double Letters | 0 | - | 4.96 | 97,294 |
| Countries that End in N | 0 | - | 4.95 | 172,377 |
| Countries with Five Letters | 0 | - | 4.96 | 284,279 |
| Countries with Six Letters | 0 | - | 4.94 | 214,691 |
| Countries with W | 0 | - | 4.96 | 161,106 |
| Countries with Z | 0 | - | 4.98 | 292,682 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,445 |
| Countries That End in U | 0 | - | 4.95 | 121,277 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,243 |
| Countries that End in O | 0 | - | 4.92 | 160,284 |
| Countries that End in R | 0 | - | 4.87 | 119,228 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,991 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,991 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 175,969 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,942 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,067 |
| Countries That End in Y | 0 | - | 4.91 | 186,124 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,709 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,342 |
| Countries that End in I | 0 | - | 4.94 | 135,368 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,821 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,098 |
| Countries That End in NIA | 0 | - | 4.92 | 110,108 |
| Countries That End in BIA | 0 | - | 4.93 | 149,660 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,839 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,824 |
| Countries That End in RIA | 0 | - | 4.93 | 127,102 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,460 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,772 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,274 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,739 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,292 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,855 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,380 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,565 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,977 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,682 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,812 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,507 |
| Countries that End in L | 0 | - | 4.94 | 157,190 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,277 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,365 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,636 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,072 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,501 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,544 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,230 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,477 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,345 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,086 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,272 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,272 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,961 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,856 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,307 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,117 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,740 |
| One Border Countries | 0 | - | 4.98 | 472,276 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,850,974 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,656,581 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,727 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,407 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,375 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,740 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,949 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,300 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,681 |
| Countries by National Anthem | 0 | - | 4.92 | 71,423 |
| NATO Countries | 0 | - | 4.98 | 283,723 |
| EU Countries Quiz | 0 | - | 4.99 | 278,362 |
| Recently Independent Countries | 0 | - | 4.98 | 160,428 |
| French-Speaking Countries | 0 | - | 4.85 | 271,783 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,186 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,014 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,652 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,351 |
| German-Speaking Countries | 0 | - | 4.92 | 146,060 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,649 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,774 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 168,476 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,601 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,657 |
