| Countries of Europe Quiz | 0 | - | 5.00 | 3,769,482 |
| Countries of South America | 0 | - | 5.00 | 925,448 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,532 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,872,764 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,481,946 |
| Landlocked Countries | 0 | - | 4.99 | 420,801 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,875 |
| Himalayan Countries | 0 | - | 4.95 | 138,204 |
| Andean Countries | 0 | - | 4.95 | 84,324 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,546 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,430 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,172 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,602 |
| Danube Countries | 0 | - | 4.97 | 71,863 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,835 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,266 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,032 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,493 |
| European Landlocked Countries | 0 | - | 4.99 | 147,004 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,413 |
| Countries with the Most Species | 0 | - | 4.99 | 103,125 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,568 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,522 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,669 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,458 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,134 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,528 |
| Countries in the Alps | 0 | - | 4.87 | 118,002 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,943 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,782 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,560 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,474 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,346 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,847 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,497 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,364 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,095 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,721 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,573 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,430 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,092 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,369 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,390 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,603 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,191 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,715 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,855 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,335 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,749 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,127 |
| Largest Countries By Category | 0 | - | 4.97 | 157,976 |
| Countries by Countries | 0 | - | 4.96 | 63,049 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,497 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,228 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,522 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,542 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,023,698 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,513 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,133 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,429 |
| Island Countries | 0 | - | 4.99 | 710,544 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,250 |
| Northernmost Countries | 0 | - | 4.99 | 361,368 |
| "Land" Countries | 0 | - | 4.98 | 336,827 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,464 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,560 |
| Countries with Megacities | 0 | - | 4.99 | 263,644 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,395 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,295 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,671 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,336 |
| Countries by Official Language | 0 | - | 4.95 | 194,996 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,023 |
| Countries in their Native Language | 0 | - | 4.99 | 198,502 |
| Independence from Whom | 0 | - | 4.99 | 211,777 |
| Subdivisions by Country | 0 | - | 4.86 | 50,377 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,098 |
| Megadiverse Countries | 0 | - | 4.96 | 134,905 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,849 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,277 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,858 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,067 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,951 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,500 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,266 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,954 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,582 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,047 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,402 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,803 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,116 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,890 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,261 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,426 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,791 |
| World Map Quiz | 0 | - | 4.81 | 64,910 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,550 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,220 |
| Countries by Founding Story | 0 | - | 4.95 | 77,245 |
| Countries by Road Signs | 0 | - | 4.98 | 53,857 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,838 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,125 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,851 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,849 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,755 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,891 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,193 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,369 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,466 |
| Widest Countries East to West | 0 | - | 4.92 | 129,533 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,420 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,214 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,073 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,658 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,440 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,725 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,325 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,771 |
| Countries with Double Letters | 0 | - | 4.97 | 95,777 |
| Countries that End in N | 0 | - | 4.95 | 170,725 |
| Countries with Five Letters | 0 | - | 4.96 | 281,789 |
| Countries with Six Letters | 0 | - | 4.94 | 213,143 |
| Countries with W | 0 | - | 4.97 | 160,026 |
| Countries with Z | 0 | - | 4.98 | 290,985 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,371 |
| Countries That End in U | 0 | - | 4.95 | 120,672 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,168 |
| Countries that End in O | 0 | - | 4.92 | 159,392 |
| Countries that End in R | 0 | - | 4.87 | 118,865 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,636 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,768 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,430 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,294 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,931 |
| Countries That End in Y | 0 | - | 4.91 | 185,785 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,621 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,678 |
| Countries that End in I | 0 | - | 4.94 | 134,997 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,809 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,717 |
| Countries That End in NIA | 0 | - | 4.92 | 109,661 |
| Countries That End in BIA | 0 | - | 4.93 | 149,045 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,931 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,265 |
| Countries That End in RIA | 0 | - | 4.93 | 126,697 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,840 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,223 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,482 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,879 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,436 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,472 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,869 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,392 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,366 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,325 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,093 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,797 |
| Countries that End in L | 0 | - | 4.94 | 156,707 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,991 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,224 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,930 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,853 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,900 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,491 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,453 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,842 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,384 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,915 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,748 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,031 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,653 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,779 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,446,160 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,444 |
| One Border Countries | 0 | - | 4.98 | 468,764 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,829,894 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,625,091 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,394 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,746 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,867 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,945 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,421 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,574 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,103 |
| Countries by National Anthem | 0 | - | 4.93 | 71,250 |
| NATO Countries | 0 | - | 4.98 | 280,586 |
| EU Countries Quiz | 0 | - | 4.99 | 274,452 |
| Recently Independent Countries | 0 | - | 4.98 | 159,282 |
| French-Speaking Countries | 0 | - | 4.85 | 270,579 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,844 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,125 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 288,528 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 273,419 |
| German-Speaking Countries | 0 | - | 4.91 | 145,602 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,845 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,190 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,855 |
| Top Five Countries by Religion | 0 | - | 4.93 | 171,665 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,468 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,718 |
