| Countries of the World Quiz | 0 | - | 5.00 | 47,992,189 |
| Landlocked Countries | 0 | - | 4.99 | 427,542 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,814,465 |
| Sahara Desert Countries | 0 | - | 4.98 | 167,052 |
| Himalayan Countries | 0 | - | 4.93 | 140,952 |
| Andean Countries | 0 | - | 4.94 | 85,863 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,971 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,581 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,516 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,734 |
| Danube Countries | 0 | - | 4.97 | 72,585 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,847 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 87,000 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,495 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,970 |
| European Landlocked Countries | 0 | - | 4.99 | 147,805 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,577 |
| Countries with the Most Species | 0 | - | 4.99 | 103,660 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,683 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,824 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,964 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,946 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,699 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,156 |
| Countries in the Alps | 0 | - | 4.87 | 119,018 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 103,072 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,210 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,080 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,205 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,174 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,411 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,627 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 54,020 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,528 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,337 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,968 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,846 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,693 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,945 |
| Countries with the Most Grassland | 0 | - | 4.94 | 78,046 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,204 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,759 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,662 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,874 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,469 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,584 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,633 |
| Largest Countries By Category | 0 | - | 4.97 | 159,140 |
| Countries by Countries | 0 | - | 4.97 | 63,832 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,492 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,453 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,716 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,268 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,877 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,132 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,537 |
| Island Countries | 0 | - | 4.99 | 713,108 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,056,509 |
| Northernmost Countries | 0 | - | 4.99 | 364,747 |
| Countries of South America | 0 | - | 5.00 | 934,711 |
| Countries of Oceania | 0 | - | 5.00 | 1,065,982 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,894,050 |
| "Land" Countries | 0 | - | 4.98 | 339,116 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,397,961 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,593 |
| Countries with Megacities | 0 | - | 4.99 | 268,052 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,237 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,382 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,560 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,485 |
| Countries by Official Language | 0 | - | 4.95 | 196,287 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 298,028 |
| Countries in their Native Language | 0 | - | 4.99 | 200,009 |
| Independence from Whom | 0 | - | 4.99 | 213,479 |
| Subdivisions by Country | 0 | - | 4.87 | 50,677 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,730 |
| Megadiverse Countries | 0 | - | 4.96 | 149,580 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,190 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,591 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,833 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,266 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,519 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,943 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,345 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,643 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,194 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,292 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,846 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,510 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,524 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,236 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,658 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,995 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,831 |
| World Map Quiz | 0 | - | 4.81 | 65,963 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 160,068 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,847 |
| Countries by Founding Story | 0 | - | 4.95 | 77,930 |
| Countries by Road Signs | 0 | - | 4.98 | 54,476 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,584 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,269 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,743 |
| Countries With the Most Languages | 0 | - | 4.90 | 204,015 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,589 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,705 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,886 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,780 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,987 |
| Widest Countries East to West | 0 | - | 4.92 | 130,889 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,637 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,447 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,578 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,180 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,250 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,637 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,547 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,930 |
| Countries with Double Letters | 0 | - | 4.96 | 97,734 |
| Countries that End in N | 0 | - | 4.95 | 172,722 |
| Countries with Five Letters | 0 | - | 4.96 | 284,768 |
| Countries with Six Letters | 0 | - | 4.94 | 215,061 |
| Countries with W | 0 | - | 4.96 | 161,383 |
| Countries with Z | 0 | - | 4.98 | 293,131 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,752 |
| Countries That End in U | 0 | - | 4.95 | 121,439 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,508 |
| Countries that End in O | 0 | - | 4.92 | 160,409 |
| Countries that End in R | 0 | - | 4.87 | 119,304 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,080 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,222 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 187,269 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,267 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,942 |
| Countries That End in Y | 0 | - | 4.91 | 186,193 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,462 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,463 |
| Countries that End in I | 0 | - | 4.94 | 135,452 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,409 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,169 |
| Countries That End in NIA | 0 | - | 4.92 | 110,181 |
| Countries That End in BIA | 0 | - | 4.93 | 149,773 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,981 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,932 |
| Countries That End in RIA | 0 | - | 4.93 | 127,183 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,575 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 229,026 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,437 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,906 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,461 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,944 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,492 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,617 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,092 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,759 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,946 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,659 |
| Countries that End in L | 0 | - | 4.94 | 157,280 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,722 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,388 |
| City to Country Quiz #1 | 0 | - | 4.96 | 157,908 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,176 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,563 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,720 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,347 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,552 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,454 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,232 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,346 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,306 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,979 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,886 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,382 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,456,530 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 383,100 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,854,705 |
| One Border Countries | 0 | - | 4.98 | 472,739 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,661,434 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,771 |
| Countries of the World in Plague Inc. | 0 | - | 4.53 | 30,304 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,492 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,582 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,866 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 113,086 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,396 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,752 |
| Majority Muslim Countries | 0 | - | 4.98 | 378,572 |
| Countries by National Anthem | 0 | - | 4.92 | 71,447 |
| NATO Countries | 0 | - | 4.98 | 284,145 |
| EU Countries Quiz | 0 | - | 4.99 | 279,060 |
| Recently Independent Countries | 0 | - | 4.98 | 160,552 |
| French-Speaking Countries | 0 | - | 4.85 | 271,953 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,270 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,316 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 292,038 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 278,191 |
| German-Speaking Countries | 0 | - | 4.92 | 146,108 |
| Word Scramble - Countries | 0 | - | 4.88 | 2,128,996 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,796 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,923 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 454,218 |
