| Countries of Europe Quiz | 0 | - | 5.00 | 3,794,543 |
| Countries of South America | 0 | - | 5.00 | 930,492 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,889 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,575 |
| Landlocked Countries | 0 | - | 4.99 | 424,203 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,761,073 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,508 |
| Himalayan Countries | 0 | - | 4.94 | 139,663 |
| Andean Countries | 0 | - | 4.94 | 85,130 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,315 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,557 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,886 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,170 |
| Danube Countries | 0 | - | 4.97 | 72,247 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,377 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,677 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,793 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,284 |
| European Landlocked Countries | 0 | - | 4.99 | 147,424 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,035 |
| Countries with the Most Species | 0 | - | 4.99 | 103,453 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,172 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,699 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,809 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,723 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,451 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,874 |
| Countries in the Alps | 0 | - | 4.87 | 118,535 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,206 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,538 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,839 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,848 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,774 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,115 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,962 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,704 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,326 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,040 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,779 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,644 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,421 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,662 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,748 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,444 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,495 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,433 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,445 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,088 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,764 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,408 |
| Largest Countries By Category | 0 | - | 4.97 | 158,597 |
| Countries by Countries | 0 | - | 4.96 | 63,475 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,050 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,358 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,636 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,951 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,724 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,223 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,761 |
| Island Countries | 0 | - | 4.99 | 711,946 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,052,945 |
| Northernmost Countries | 0 | - | 4.99 | 363,283 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,029,086 |
| "Land" Countries | 0 | - | 4.98 | 337,991 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,390,024 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,677 |
| Countries with Megacities | 0 | - | 4.99 | 266,181 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,411 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,840 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,694 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,958 |
| Countries by Official Language | 0 | - | 4.95 | 195,733 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,235 |
| Countries in their Native Language | 0 | - | 4.99 | 199,498 |
| Independence from Whom | 0 | - | 4.99 | 212,685 |
| Subdivisions by Country | 0 | - | 4.87 | 50,550 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,166 |
| Megadiverse Countries | 0 | - | 4.96 | 135,174 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,692 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,469 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,367 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,172 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,411 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,730 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,849 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,489 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,765 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,217 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,143 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,290 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,359 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,077 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,497 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,615 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,945 |
| World Map Quiz | 0 | - | 4.81 | 65,410 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,470 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,554 |
| Countries by Founding Story | 0 | - | 4.95 | 77,633 |
| Countries by Road Signs | 0 | - | 4.98 | 54,235 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,931 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,885 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,403 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,142 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,258 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,381 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,576 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,608 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,826 |
| Widest Countries East to West | 0 | - | 4.92 | 130,281 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,552 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,072 |
| 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 | 94,961 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,837 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,335 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,459 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,860 |
| Countries with Double Letters | 0 | - | 4.96 | 96,757 |
| Countries that End in N | 0 | - | 4.95 | 171,647 |
| Countries with Five Letters | 0 | - | 4.96 | 283,336 |
| Countries with Six Letters | 0 | - | 4.94 | 214,101 |
| Countries with W | 0 | - | 4.96 | 160,712 |
| Countries with Z | 0 | - | 4.98 | 292,068 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,064 |
| Countries That End in U | 0 | - | 4.95 | 121,058 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,865 |
| Countries that End in O | 0 | - | 4.92 | 159,705 |
| 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 | 209,540 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,978 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,693 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,614 |
| Countries That End in Y | 0 | - | 4.91 | 186,015 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,247 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,115 |
| Countries that End in I | 0 | - | 4.94 | 135,239 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,431 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,959 |
| Countries That End in NIA | 0 | - | 4.92 | 109,946 |
| Countries That End in BIA | 0 | - | 4.93 | 149,432 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,371 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,648 |
| Countries That End in RIA | 0 | - | 4.93 | 126,963 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,250 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,193 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,996 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,431 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,986 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,721 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,220 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,503 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,752 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,569 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,551 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 54,254 |
| Countries that End in L | 0 | - | 4.94 | 157,015 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,886 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,313 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,174 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,109 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,152 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,171 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,969 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,329 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,098 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,790 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,092 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,186 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,769 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,148 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,451,841 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,900 |
| One Border Countries | 0 | - | 4.98 | 471,183 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,843,338 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,645,316 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,169 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,699 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,493 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,778 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,044 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,452 |
| Countries by National Anthem | 0 | - | 4.92 | 71,368 |
| NATO Countries | 0 | - | 4.98 | 282,680 |
| EU Countries Quiz | 0 | - | 4.99 | 276,979 |
| Recently Independent Countries | 0 | - | 4.98 | 159,758 |
| French-Speaking Countries | 0 | - | 4.85 | 271,390 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,990 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,322 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 290,474 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 275,912 |
| German-Speaking Countries | 0 | - | 4.92 | 145,931 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,143 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,433 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 167,413 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,913 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,799 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,646 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 112,900 |
