| Countries of the World Quiz | 0 | - | 5.00 | 47,288,825 |
| Landlocked Countries | 0 | - | 4.99 | 418,245 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,752,853 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,637 |
| Himalayan Countries | 0 | - | 4.94 | 137,120 |
| Andean Countries | 0 | - | 4.95 | 83,778 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,021 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,400 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,698 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,257 |
| Danube Countries | 0 | - | 4.97 | 71,583 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,449 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,986 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,523 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,580 |
| European Landlocked Countries | 0 | - | 4.99 | 146,696 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,024 |
| Countries with the Most Species | 0 | - | 4.99 | 102,816 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,161 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,400 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,558 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,261 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,932 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,310 |
| Countries in the Alps | 0 | - | 4.87 | 117,586 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,065 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,245 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,370 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,913 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,021 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,398 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,189 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,131 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,929 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,494 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,443 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,302 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,875 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,138 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,161 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,041 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,013 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,537 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,428 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,992 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,071 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,946 |
| Largest Countries By Category | 0 | - | 4.97 | 157,538 |
| Countries by Countries | 0 | - | 4.96 | 62,779 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,122 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,138 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,455 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,293 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.97 | 98,584 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,263 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,351 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,411 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,765 |
| Island Countries | 0 | - | 4.99 | 709,475 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,045,335 |
| Northernmost Countries | 0 | - | 4.99 | 360,182 |
| Countries of South America | 0 | - | 5.00 | 922,104 |
| Countries of Oceania | 0 | - | 5.00 | 1,049,962 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,864,467 |
| "Land" Countries | 0 | - | 4.98 | 335,644 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,374,245 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,779 |
| Countries with Megacities | 0 | - | 4.99 | 249,980 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,632 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,854 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,938 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,830 |
| Countries by Official Language | 0 | - | 4.95 | 194,512 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,359 |
| Countries in their Native Language | 0 | - | 4.99 | 198,078 |
| Independence from Whom | 0 | - | 4.99 | 211,182 |
| Subdivisions by Country | 0 | - | 4.86 | 50,262 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,604 |
| Megadiverse Countries | 0 | - | 4.96 | 134,719 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,194 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,152 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,719 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,999 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,643 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,331 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,875 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,790 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,456 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,956 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,801 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,674 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,938 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,746 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,098 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,289 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,011 |
| World Map Quiz | 0 | - | 4.81 | 64,411 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,254 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,965 |
| Countries by Founding Story | 0 | - | 4.95 | 77,015 |
| Countries by Road Signs | 0 | - | 4.98 | 53,593 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,376 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,865 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,574 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,150 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,455 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,632 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,773 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,228 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,229 |
| Widest Countries East to West | 0 | - | 4.92 | 129,316 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,372 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,883 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,976 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,470 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,151 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,487 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,211 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,714 |
| Countries with Double Letters | 0 | - | 4.97 | 94,980 |
| Countries that End in N | 0 | - | 4.95 | 169,719 |
| Countries with Five Letters | 0 | - | 4.96 | 279,257 |
| Countries with Six Letters | 0 | - | 4.94 | 212,333 |
| Countries with W | 0 | - | 4.97 | 159,427 |
| Countries with Z | 0 | - | 4.98 | 289,665 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,639 |
| Countries That End in U | 0 | - | 4.95 | 120,366 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,659 |
| Countries that End in O | 0 | - | 4.92 | 159,160 |
| Countries that End in R | 0 | - | 4.87 | 118,698 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,477 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,205 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,040 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,041 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,623 |
| Countries That End in Y | 0 | - | 4.90 | 185,614 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,143 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,345 |
| Countries that End in I | 0 | - | 4.94 | 134,833 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,993 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,544 |
| Countries That End in NIA | 0 | - | 4.92 | 109,476 |
| Countries That End in BIA | 0 | - | 4.93 | 148,786 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,644 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,998 |
| Countries That End in RIA | 0 | - | 4.93 | 126,486 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,579 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,524 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,132 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,474 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,036 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,280 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,629 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,181 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,065 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,165 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,761 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,458 |
| Countries that End in L | 0 | - | 4.94 | 156,497 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,763 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,144 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,803 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,681 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,727 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,662 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,063 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,551 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,030 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,512 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,510 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,928 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.80 | 108,343 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,582 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,621 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,442,386 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,489 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,820,287 |
| One Border Countries | 0 | - | 4.98 | 467,337 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,612,158 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,250 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,473 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,260 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,591 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,221 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,293 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,848 |
| Majority Muslim Countries | 0 | - | 4.98 | 372,872 |
| Countries by National Anthem | 0 | - | 4.93 | 71,167 |
| NATO Countries | 0 | - | 4.98 | 279,001 |
| EU Countries Quiz | 0 | - | 4.99 | 272,607 |
| Recently Independent Countries | 0 | - | 4.98 | 158,938 |
| French-Speaking Countries | 0 | - | 4.85 | 270,104 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,738 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,389 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,221 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,575 |
| German-Speaking Countries | 0 | - | 4.91 | 145,205 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,097,195 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,188 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,772 |
