| Countries of Europe Quiz | 0 | - | 5.00 | 3,794,254 |
| Countries of South America | 0 | - | 5.00 | 930,438 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,834 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,467 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,757,842 |
| Landlocked Countries | 0 | - | 4.99 | 424,158 |
| Countries with Four Letters | 0 | - | 4.99 | 424,984 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,485 |
| Himalayan Countries | 0 | - | 4.94 | 139,648 |
| Andean Countries | 0 | - | 4.94 | 85,122 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,310 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,546 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,877 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,162 |
| Danube Countries | 0 | - | 4.97 | 72,243 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,372 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,667 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,790 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,272 |
| European Landlocked Countries | 0 | - | 4.99 | 147,417 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,029 |
| Countries with the Most Species | 0 | - | 4.99 | 103,449 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,167 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,696 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,806 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,722 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,450 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,872 |
| Countries in the Alps | 0 | - | 4.87 | 118,528 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,193 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,520 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,835 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,845 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,772 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,115 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,959 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,701 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,322 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,039 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,777 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,643 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,413 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,655 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,745 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,436 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,492 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,409 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,443 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,066 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,750 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,406 |
| Largest Countries By Category | 0 | - | 4.97 | 158,592 |
| Countries by Countries | 0 | - | 4.96 | 63,471 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,047 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,357 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,635 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,235 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,944 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,029,040 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 127,586 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 108,118 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 154,331 |
| Bordering Countries Beginning With the Same Letter | 0 | - | 4.99 | 140,168 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 218,293 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,648 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,203 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,735 |
| Island Countries | 0 | - | 4.99 | 711,924 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,052,894 |
| Northernmost Countries | 0 | - | 4.99 | 363,260 |
| "Land" Countries | 0 | - | 4.98 | 337,980 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,389,841 |
| Shortest Country Name A-Z | 0 | - | 4.99 | 238,261 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,629 |
| Countries with Megacities | 0 | - | 4.99 | 266,126 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,371 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,821 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,659 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,943 |
| Countries by Official Language | 0 | - | 4.95 | 195,717 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,224 |
| Countries in their Native Language | 0 | - | 4.99 | 199,488 |
| Independence from Whom | 0 | - | 4.99 | 212,675 |
| Subdivisions by Country | 0 | - | 4.87 | 50,548 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,161 |
| Megadiverse Countries | 0 | - | 4.96 | 135,169 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,617 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,468 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,366 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,171 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,408 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,725 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,835 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,484 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,764 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,215 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,138 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,285 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,354 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,074 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,496 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,613 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,934 |
| World Map Quiz | 0 | - | 4.81 | 65,409 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,444 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,550 |
| Countries by Founding Story | 0 | - | 4.95 | 77,629 |
| Countries by Road Signs | 0 | - | 4.98 | 54,233 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,915 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,841 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,399 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,123 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,245 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,378 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,573 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,607 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,759 |
| Widest Countries East to West | 0 | - | 4.92 | 130,272 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,549 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,066 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,452 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,959 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,834 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,328 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,456 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,859 |
| Countries with Double Letters | 0 | - | 4.96 | 96,750 |
| Countries that End in N | 0 | - | 4.95 | 171,636 |
| Countries with Five Letters | 0 | - | 4.96 | 283,320 |
| Countries with Six Letters | 0 | - | 4.94 | 214,088 |
| Countries with W | 0 | - | 4.96 | 160,704 |
| Countries with Z | 0 | - | 4.98 | 292,057 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,060 |
| Countries That End in U | 0 | - | 4.95 | 121,056 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,854 |
| Countries that End in O | 0 | - | 4.92 | 159,702 |
| Countries that End in R | 0 | - | 4.87 | 119,098 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,847 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,536 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,974 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,687 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,609 |
| Countries That End in Y | 0 | - | 4.91 | 186,014 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,241 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,108 |
| Countries that End in I | 0 | - | 4.94 | 135,232 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,428 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,956 |
| Countries That End in NIA | 0 | - | 4.92 | 109,945 |
| Countries That End in BIA | 0 | - | 4.93 | 149,429 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,369 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,648 |
| Countries That End in RIA | 0 | - | 4.93 | 126,961 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,247 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,184 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,992 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,429 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,980 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,717 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,217 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,503 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,751 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,565 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,545 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 54,248 |
| Countries that End in L | 0 | - | 4.94 | 157,013 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,866 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,313 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,168 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,107 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,150 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,168 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,964 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,324 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,091 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,779 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,084 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,185 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,768 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,145 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,451,783 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,877 |
| One Border Countries | 0 | - | 4.98 | 471,153 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,843,225 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,645,091 |
| Top 15 Most Populous Countries Ending in "IA" | 0 | - | 4.77 | 116,019 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,610 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,158 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,684 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,484 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,771 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,037 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,445 |
| Countries by National Anthem | 0 | - | 4.92 | 71,367 |
| NATO Countries | 0 | - | 4.98 | 282,663 |
| EU Countries Quiz | 0 | - | 4.99 | 276,948 |
| Recently Independent Countries | 0 | - | 4.98 | 159,755 |
| French-Speaking Countries | 0 | - | 4.85 | 271,377 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,989 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,306 |
