| Countries of the World Quiz | 0 | - | 5.00 | 47,826,905 |
| Countries of Africa | 0 | - | 5.00 | 2,556,731 |
| Landlocked Countries | 0 | - | 4.99 | 425,012 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,799,821 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,882 |
| Himalayan Countries | 0 | - | 4.93 | 139,957 |
| Andean Countries | 0 | - | 4.94 | 85,283 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,440 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,788 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,015 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,308 |
| Danube Countries | 0 | - | 4.97 | 72,310 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,472 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,751 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,964 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,457 |
| European Landlocked Countries | 0 | - | 4.99 | 147,523 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,176 |
| Countries with the Most Species | 0 | - | 4.99 | 103,515 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,307 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,737 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,849 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,784 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,518 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,948 |
| Countries in the Alps | 0 | - | 4.87 | 118,677 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,464 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,718 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,913 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,952 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,871 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,182 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,310 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,806 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,366 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,110 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,816 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,689 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,493 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,727 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,824 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,656 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,555 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,675 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,568 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,411 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,972 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,469 |
| Largest Countries By Category | 0 | - | 4.97 | 158,748 |
| Countries by Countries | 0 | - | 4.96 | 63,572 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,175 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,378 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,653 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,033 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,873 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,475 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,308 |
| Island Countries | 0 | - | 4.99 | 712,289 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,958 |
| Northernmost Countries | 0 | - | 4.99 | 363,675 |
| Countries of South America | 0 | - | 5.00 | 931,675 |
| Countries of Oceania | 0 | - | 5.00 | 1,062,125 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,887,008 |
| "Land" Countries | 0 | - | 4.98 | 338,231 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,392,072 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,974 |
| Countries with Megacities | 0 | - | 4.99 | 266,760 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,662 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,012 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,979 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,133 |
| Countries by Official Language | 0 | - | 4.95 | 195,870 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,465 |
| Countries in their Native Language | 0 | - | 4.99 | 199,637 |
| Independence from Whom | 0 | - | 4.99 | 212,908 |
| Subdivisions by Country | 0 | - | 4.87 | 50,588 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,332 |
| Megadiverse Countries | 0 | - | 4.96 | 135,228 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,849 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,504 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,412 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,205 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,509 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,805 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,024 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,536 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,793 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,241 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,379 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,341 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,407 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,121 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,552 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,663 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,179 |
| World Map Quiz | 0 | - | 4.81 | 65,581 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,896 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,648 |
| Countries by Founding Story | 0 | - | 4.95 | 77,743 |
| Countries by Road Signs | 0 | - | 4.98 | 54,302 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,118 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,994 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,484 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,384 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,352 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,463 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,664 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,650 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,491 |
| Widest Countries East to West | 0 | - | 4.92 | 130,390 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,578 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,177 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,489 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,014 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,925 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,410 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,476 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,881 |
| Countries with Double Letters | 0 | - | 4.96 | 96,937 |
| Countries that End in N | 0 | - | 4.94 | 171,810 |
| Countries with Five Letters | 0 | - | 4.96 | 283,580 |
| Countries with Six Letters | 0 | - | 4.94 | 214,308 |
| Countries with W | 0 | - | 4.96 | 160,847 |
| Countries with Z | 0 | - | 4.98 | 292,284 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,202 |
| Countries That End in U | 0 | - | 4.95 | 121,128 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,002 |
| Countries that End in O | 0 | - | 4.92 | 159,963 |
| Countries that End in R | 0 | - | 4.87 | 119,143 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,899 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,725 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,079 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,767 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,701 |
| Countries That End in Y | 0 | - | 4.91 | 186,058 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,379 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,204 |
| Countries that End in I | 0 | - | 4.94 | 135,279 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,541 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,017 |
| Countries That End in NIA | 0 | - | 4.92 | 110,012 |
| Countries That End in BIA | 0 | - | 4.93 | 149,530 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,459 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,722 |
| Countries That End in RIA | 0 | - | 4.93 | 127,021 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,326 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,435 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,094 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,538 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,108 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,771 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,281 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,524 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,843 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,616 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,649 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,344 |
| Countries that End in L | 0 | - | 4.94 | 157,077 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,757 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,333 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,328 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,872 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,392 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,329 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,077 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,391 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,192 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,895 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,160 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,220 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,807 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,195 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,453,125 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,233 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,846,300 |
| One Border Countries | 0 | - | 4.98 | 471,651 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,649,737 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,669 |
| One Country By Letter By Continent | 0 | - | 5.00 | 125,408 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,271 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,902 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,587 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,854 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,147 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,544 |
| Majority Muslim Countries | 0 | - | 4.98 | 377,301 |
| Countries by National Anthem | 0 | - | 4.92 | 71,394 |
| NATO Countries | 0 | - | 4.98 | 283,119 |
| EU Countries Quiz | 0 | - | 4.99 | 277,481 |
| Recently Independent Countries | 0 | - | 4.98 | 160,079 |
| French-Speaking Countries | 0 | - | 4.85 | 271,554 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,022 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,585 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,034 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,588 |
| German-Speaking Countries | 0 | - | 4.92 | 145,978 |
| Word Scramble - Countries | 0 | - | 4.87 | 2,116,490 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,208 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,491 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 453,027 |
