| Countries of Europe Quiz | 0 | - | 5.00 | 3,757,384 |
| Countries of South America | 0 | - | 5.00 | 923,021 |
| Countries of Oceania | 0 | - | 5.00 | 1,051,166 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,866,617 |
| Landlocked Countries | 0 | - | 4.99 | 419,044 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,340,267 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,030 |
| Himalayan Countries | 0 | - | 4.94 | 137,461 |
| Andean Countries | 0 | - | 4.95 | 83,959 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,240 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,689 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,846 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,363 |
| Danube Countries | 0 | - | 4.97 | 71,673 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,563 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,066 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,668 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,744 |
| European Landlocked Countries | 0 | - | 4.99 | 146,787 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,146 |
| Countries with the Most Species | 0 | - | 4.99 | 102,921 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,281 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,434 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,592 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,310 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,996 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,370 |
| Countries in the Alps | 0 | - | 4.87 | 117,703 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,143 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,379 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,428 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,001 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,110 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,644 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,292 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,195 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,974 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,560 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,486 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,343 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,933 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,192 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,215 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,206 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,069 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,577 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,535 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,425 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,246 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,008 |
| Largest Countries By Category | 0 | - | 4.97 | 157,655 |
| Countries by Countries | 0 | - | 4.96 | 62,847 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,226 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,165 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,474 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,330 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,076 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,629 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,148 |
| Island Countries | 0 | - | 4.99 | 709,801 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,131 |
| Northernmost Countries | 0 | - | 4.99 | 360,514 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,020,873 |
| "Land" Countries | 0 | - | 4.98 | 335,809 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,375,869 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,048 |
| Countries with Megacities | 0 | - | 4.99 | 260,457 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,917 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,011 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,192 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,017 |
| Countries by Official Language | 0 | - | 4.95 | 194,652 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,555 |
| Countries in their Native Language | 0 | - | 4.99 | 198,204 |
| Independence from Whom | 0 | - | 4.99 | 211,335 |
| Subdivisions by Country | 0 | - | 4.86 | 50,289 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,725 |
| Megadiverse Countries | 0 | - | 4.96 | 134,773 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,555 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,188 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,760 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,018 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,717 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,386 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,988 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,847 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,490 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,992 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,005 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,724 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,998 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,784 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,157 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,328 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,215 |
| World Map Quiz | 0 | - | 4.81 | 64,539 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,647 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,040 |
| Countries by Founding Story | 0 | - | 4.95 | 77,077 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,518 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,934 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,650 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,342 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,523 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,677 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,837 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,267 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,290 |
| Widest Countries East to West | 0 | - | 4.92 | 129,381 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,386 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,968 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,995 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,515 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,227 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,559 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,236 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,729 |
| Countries with Double Letters | 0 | - | 4.97 | 95,109 |
| Countries that End in N | 0 | - | 4.95 | 170,019 |
| Countries with Five Letters | 0 | - | 4.96 | 280,310 |
| Countries with Six Letters | 0 | - | 4.94 | 212,500 |
| Countries with W | 0 | - | 4.97 | 159,527 |
| Countries with Z | 0 | - | 4.98 | 289,827 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,760 |
| Countries That End in U | 0 | - | 4.95 | 120,418 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,765 |
| Countries that End in O | 0 | - | 4.92 | 159,202 |
| Countries that End in R | 0 | - | 4.87 | 118,737 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,516 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,346 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,117 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,093 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,672 |
| Countries That End in Y | 0 | - | 4.90 | 185,651 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,235 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,438 |
| Countries that End in I | 0 | - | 4.94 | 134,874 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,093 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,583 |
| Countries That End in NIA | 0 | - | 4.92 | 109,520 |
| Countries That End in BIA | 0 | - | 4.93 | 148,851 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,736 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,067 |
| Countries That End in RIA | 0 | - | 4.93 | 126,545 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,642 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,728 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,239 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,601 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,125 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,336 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,690 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,247 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,135 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,201 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,834 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,550 |
| Countries that End in L | 0 | - | 4.94 | 156,542 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,055 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,156 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,842 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,727 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,787 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,795 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,180 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,638 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,138 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,623 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,586 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,960 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,603 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,671 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,443,412 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,770 |
| One Border Countries | 0 | - | 4.98 | 467,740 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,822,990 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,615,343 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,565 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,450 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,692 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,280 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,381 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,937 |
| Countries by National Anthem | 0 | - | 4.93 | 71,185 |
| NATO Countries | 0 | - | 4.98 | 279,390 |
| EU Countries Quiz | 0 | - | 4.99 | 272,993 |
| Recently Independent Countries | 0 | - | 4.98 | 159,027 |
| French-Speaking Countries | 0 | - | 4.85 | 270,231 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,765 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,600 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,525 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,003 |
| German-Speaking Countries | 0 | - | 4.91 | 145,346 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,313 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,941 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,147 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,812 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,846 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,377 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,616 |
| Olympic Host Countries | 0 | - | 4.98 | 200,416 |
