| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,685 |
| Countries with Glaciers | 0 | - | 4.97 | 105,254 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,573 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 81,997 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,341,908 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,603 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.61 | 37,784 |
| Landlocked Countries | 0 | - | 4.99 | 419,068 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,597 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,757,464 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,033 |
| Himalayan Countries | 0 | - | 4.94 | 137,471 |
| Andean Countries | 0 | - | 4.95 | 83,962 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,241 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,694 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,851 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,365 |
| Danube Countries | 0 | - | 4.97 | 71,674 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,566 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,066 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,672 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,749 |
| European Landlocked Countries | 0 | - | 4.99 | 146,789 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,147 |
| Countries with the Most Species | 0 | - | 4.99 | 102,923 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,284 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,435 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,592 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,313 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,999 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,372 |
| Countries in the Alps | 0 | - | 4.87 | 117,706 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,146 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,386 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,428 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,003 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,111 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,667 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,293 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,198 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,974 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,560 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,487 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,343 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,937 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,195 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,217 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,211 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,070 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,579 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,536 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,439 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,252 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,009 |
| Largest Countries By Category | 0 | - | 4.97 | 157,658 |
| Countries by Countries | 0 | - | 4.96 | 62,848 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,229 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,166 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,475 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,332 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,094 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,635 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,164 |
| Island Countries | 0 | - | 4.99 | 709,808 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,153 |
| Northernmost Countries | 0 | - | 4.99 | 360,525 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,591 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,416 |
| Countries of South America | 0 | - | 5.00 | 923,044 |
| Countries of Oceania | 0 | - | 5.00 | 1,051,209 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,866,668 |
| "Land" Countries | 0 | - | 4.98 | 335,821 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,134 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,375,922 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,057 |
| Countries with Megacities | 0 | - | 4.99 | 260,585 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,923 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,016 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,198 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,021 |
| Countries by Official Language | 0 | - | 4.95 | 194,654 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,560 |
| Countries in their Native Language | 0 | - | 4.99 | 198,208 |
| Independence from Whom | 0 | - | 4.99 | 211,342 |
| Subdivisions by Country | 0 | - | 4.86 | 50,290 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,729 |
| Megadiverse Countries | 0 | - | 4.96 | 134,775 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,559 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,188 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,760 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,019 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,720 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,388 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,992 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,847 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,491 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,994 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,014 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,724 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,998 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,785 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,159 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,329 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,224 |
| World Map Quiz | 0 | - | 4.81 | 64,543 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,656 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,041 |
| Countries by Founding Story | 0 | - | 4.95 | 77,078 |
| Countries by Road Signs | 0 | - | 4.98 | 53,661 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,524 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,936 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,652 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,350 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,525 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,678 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,837 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,268 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,294 |
| Widest Countries East to West | 0 | - | 4.92 | 129,385 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,386 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,968 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,995 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,516 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,228 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,560 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,238 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,729 |
| Countries with Double Letters | 0 | - | 4.97 | 95,114 |
| Countries that End in N | 0 | - | 4.95 | 170,027 |
| Countries with Five Letters | 0 | - | 4.96 | 280,331 |
| Countries with Six Letters | 0 | - | 4.94 | 212,506 |
| Countries with W | 0 | - | 4.97 | 159,530 |
| Countries with Z | 0 | - | 4.98 | 289,830 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,762 |
| Countries That End in U | 0 | - | 4.95 | 120,420 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,767 |
| Countries that End in O | 0 | - | 4.92 | 159,203 |
| Countries that End in R | 0 | - | 4.87 | 118,738 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,517 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,350 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,122 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,093 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,676 |
| Countries That End in Y | 0 | - | 4.90 | 185,651 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,240 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,442 |
| Countries that End in I | 0 | - | 4.94 | 134,876 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,096 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,583 |
| Countries That End in NIA | 0 | - | 4.92 | 109,522 |
| Countries That End in BIA | 0 | - | 4.93 | 148,851 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,737 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,071 |
| Countries That End in RIA | 0 | - | 4.93 | 126,545 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,644 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,733 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,246 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,607 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,126 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,336 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,691 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,248 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,139 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,202 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,838 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,552 |
| Countries that End in L | 0 | - | 4.94 | 156,543 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,068 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,156 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,844 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,730 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,788 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,802 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,184 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,641 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,143 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,626 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,591 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,963 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,603 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,673 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,443,449 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,778 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,145 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,823,062 |
| One Border Countries | 0 | - | 4.98 | 467,749 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,615,431 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,420 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,217 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,293 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,568 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,454 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,694 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,282 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,384 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,939 |
| Majority Muslim Countries | 0 | - | 4.98 | 373,330 |
| Countries by National Anthem | 0 | - | 4.93 | 71,185 |
| NATO Countries | 0 | - | 4.98 | 279,398 |
| EU Countries Quiz | 0 | - | 4.99 | 273,003 |
