| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,764 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,598,147 |
| Landlocked Countries | 0 | - | 4.99 | 422,162 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,780,128 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,573 |
| Himalayan Countries | 0 | - | 4.94 | 138,832 |
| Andean Countries | 0 | - | 4.93 | 84,668 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,866 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,905 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,495 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,842 |
| Danube Countries | 0 | - | 4.97 | 72,038 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,045 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,446 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,351 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,835 |
| European Landlocked Countries | 0 | - | 4.99 | 147,165 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,681 |
| Countries with the Most Species | 0 | - | 4.99 | 103,265 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,797 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,605 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,729 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,557 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,247 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,685 |
| Countries in the Alps | 0 | - | 4.87 | 118,235 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,233 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,067 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,674 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,618 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,542 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,961 |
| Countries with Glaciers | 0 | - | 4.97 | 105,560 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,697 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,514 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,194 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,869 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,667 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,540 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,243 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,493 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,546 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,958 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,332 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,031 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,119 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,043 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,182 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,249 |
| Largest Countries By Category | 0 | - | 4.97 | 158,248 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,694 |
| Countries by Countries | 0 | - | 4.96 | 63,260 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,712 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,297 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,571 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,690 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,755 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,727 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,565 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,451 |
| Island Countries | 0 | - | 4.99 | 711,113 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,128 |
| Northernmost Countries | 0 | - | 4.99 | 362,048 |
| Countries of South America | 0 | - | 5.00 | 927,632 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,336 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,877,931 |
| "Land" Countries | 0 | - | 4.98 | 337,401 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,384,168 |
| Elements Named for Countries | 0 | - | 4.53 | 24,803 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,947 |
| Countries with Megacities | 0 | - | 4.99 | 264,665 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,777 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,496 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,045 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,568 |
| Countries by Official Language | 0 | - | 4.95 | 195,289 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,425 |
| Countries in their Native Language | 0 | - | 4.99 | 199,079 |
| Independence from Whom | 0 | - | 4.99 | 212,148 |
| Subdivisions by Country | 0 | - | 4.86 | 50,438 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,764 |
| Megadiverse Countries | 0 | - | 4.96 | 135,030 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,124 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,370 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,245 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,115 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,161 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,605 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,499 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,045 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,669 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,154 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,704 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,896 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,218 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,977 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,364 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,506 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,241 |
| World Map Quiz | 0 | - | 4.81 | 65,119 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,385 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,368 |
| Countries by Founding Story | 0 | - | 4.95 | 77,390 |
| Countries by Road Signs | 0 | - | 4.98 | 54,027 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,126 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,306 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,016 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,253 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,917 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,028 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,318 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,450 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,587 |
| Widest Countries East to West | 0 | - | 4.92 | 129,667 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,462 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,398 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,126 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,779 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,613 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,884 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,379 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,801 |
| Countries with Double Letters | 0 | - | 4.96 | 96,263 |
| Countries that End in N | 0 | - | 4.95 | 171,152 |
| Countries with Five Letters | 0 | - | 4.96 | 282,542 |
| Countries with Six Letters | 0 | - | 4.94 | 213,588 |
| Countries with W | 0 | - | 4.97 | 160,344 |
| Countries with Z | 0 | - | 4.98 | 291,497 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,722 |
| Countries That End in U | 0 | - | 4.95 | 120,863 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,482 |
| Countries that End in O | 0 | - | 4.92 | 159,518 |
| Countries that End in R | 0 | - | 4.87 | 118,975 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,735 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,126 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,707 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,482 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,408 |
| Countries That End in Y | 0 | - | 4.91 | 185,881 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,939 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,869 |
| Countries that End in I | 0 | - | 4.94 | 135,101 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,127 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,826 |
| Countries That End in NIA | 0 | - | 4.92 | 109,793 |
| Countries That End in BIA | 0 | - | 4.93 | 149,223 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,133 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,437 |
| Countries That End in RIA | 0 | - | 4.93 | 126,811 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,028 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,649 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,720 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,143 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,696 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,582 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,036 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,447 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,531 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,426 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,301 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,991 |
| Countries that End in L | 0 | - | 4.94 | 156,848 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,835 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,269 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,033 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,961 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,003 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,765 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,672 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,001 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,553 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,458 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,873 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,105 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,709 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,877 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,485 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,039 |
| One Border Countries | 0 | - | 4.98 | 469,969 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,835,445 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,633,182 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,481 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,384 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,747 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,482 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,955 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,231 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,175 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,579 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,755 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,236 |
| Countries by National Anthem | 0 | - | 4.93 | 71,294 |
| NATO Countries | 0 | - | 4.98 | 281,602 |
| EU Countries Quiz | 0 | - | 4.99 | 275,608 |
| Recently Independent Countries | 0 | - | 4.98 | 159,491 |
| French-Speaking Countries | 0 | - | 4.85 | 270,892 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,903 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,586 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,390 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,553 |
