| Countries of Europe Quiz | 0 | - | 5.00 | 3,812,040 |
| Countries of South America | 0 | - | 5.00 | 934,218 |
| Countries of Oceania | 0 | - | 5.00 | 1,065,429 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,892,869 |
| Countries With the Most Islands of at Least 10 Km² | 0 | - | 4.88 | 145,435 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,965,778 |
| Landlocked Countries | 0 | - | 4.99 | 427,206 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,891 |
| Himalayan Countries | 0 | - | 4.93 | 140,805 |
| Andean Countries | 0 | - | 4.94 | 85,792 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,910 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,477 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,458 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,684 |
| Danube Countries | 0 | - | 4.97 | 72,546 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,795 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,970 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,429 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,909 |
| European Landlocked Countries | 0 | - | 4.99 | 147,735 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,530 |
| Countries with the Most Species | 0 | - | 4.99 | 103,643 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,632 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,812 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,951 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,923 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,677 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,125 |
| Countries in the Alps | 0 | - | 4.87 | 118,967 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,979 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,123 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,053 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,169 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,125 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,387 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,587 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,987 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,512 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,309 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,951 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,829 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,669 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,921 |
| Countries with the Most Grassland | 0 | - | 4.94 | 78,019 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,136 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,730 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,415 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,831 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,276 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,483 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,613 |
| Largest Countries By Category | 0 | - | 4.97 | 159,080 |
| African Island Countries | 0 | - | 4.96 | 102,725 |
| Countries by Countries | 0 | - | 4.97 | 63,799 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,434 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,448 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,704 |
| All Countries by Population With a Map | 0 | - | 4.98 | 111,410 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,545 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,223 |
| Islands by Country #1 | 0 | - | 4.90 | 176,483 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,033,140 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,577 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,029 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,339 |
| Island Countries | 0 | - | 4.99 | 713,000 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,056,112 |
| Northernmost Countries | 0 | - | 4.99 | 364,579 |
| "Land" Countries | 0 | - | 4.98 | 338,982 |
| Richest Island Countries | 0 | - | 4.85 | 101,348 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,396,928 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 69,287 |
| Name a Valid Island Country | 0 | - | 4.97 | 130,434 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,481 |
| Countries with Megacities | 0 | - | 4.99 | 267,819 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,132 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,333 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,463 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,430 |
| Countries by Official Language | 0 | - | 4.95 | 196,210 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,930 |
| Countries in their Native Language | 0 | - | 4.99 | 199,949 |
| Independence from Whom | 0 | - | 4.99 | 213,394 |
| Subdivisions by Country | 0 | - | 4.87 | 50,664 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,655 |
| Megadiverse Countries | 0 | - | 4.96 | 148,951 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,131 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,574 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,802 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,257 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,465 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,924 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,273 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,622 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,162 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,286 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,756 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,485 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,505 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,216 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,638 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,973 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,716 |
| World Map Quiz | 0 | - | 4.81 | 65,923 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,875 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,813 |
| Countries by Founding Story | 0 | - | 4.95 | 77,904 |
| Countries by Road Signs | 0 | - | 4.98 | 54,444 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,504 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,231 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,702 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,922 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,542 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,662 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,846 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,762 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,937 |
| Widest Countries East to West | 0 | - | 4.92 | 130,846 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,627 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,397 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,560 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,156 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,105 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,612 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,534 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,922 |
| Countries with Double Letters | 0 | - | 4.96 | 97,612 |
| Countries that End in N | 0 | - | 4.95 | 172,622 |
| Countries with Five Letters | 0 | - | 4.96 | 284,624 |
| Countries with Six Letters | 0 | - | 4.94 | 214,948 |
| Countries with W | 0 | - | 4.96 | 161,300 |
| Countries with Z | 0 | - | 4.98 | 292,987 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,663 |
| Countries That End in U | 0 | - | 4.95 | 121,387 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,420 |
| Countries that End in O | 0 | - | 4.92 | 160,369 |
| Countries that End in R | 0 | - | 4.87 | 119,276 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,060 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,143 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 185,554 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,186 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,739 |
| Countries That End in Y | 0 | - | 4.91 | 186,174 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,243 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,414 |
| Countries that End in I | 0 | - | 4.94 | 135,422 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,242 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,144 |
| Countries That End in NIA | 0 | - | 4.92 | 110,158 |
| Countries That End in BIA | 0 | - | 4.93 | 149,734 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,928 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,901 |
| Countries That End in RIA | 0 | - | 4.93 | 127,143 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,542 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,931 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,385 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,847 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,401 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,919 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,455 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,604 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,051 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,732 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,903 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,608 |
| Countries that End in L | 0 | - | 4.94 | 157,246 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,573 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,379 |
| City to Country Quiz #1 | 0 | - | 4.96 | 157,882 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,155 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,541 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,654 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,306 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,520 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,406 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,188 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,318 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,296 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,969 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,873 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,361 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,957 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,959 |
| One Border Countries | 0 | - | 4.98 | 472,558 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,853,084 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,659,409 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,755 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,463 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,509 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,808 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,992 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,356 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,716 |
| Countries by National Anthem | 0 | - | 4.92 | 71,434 |
| NATO Countries | 0 | - | 4.98 | 283,962 |
| EU Countries Quiz | 0 | - | 4.99 | 278,860 |
| Recently Independent Countries | 0 | - | 4.98 | 160,503 |
| French-Speaking Countries | 0 | - | 4.85 | 271,871 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,239 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,179 |
