| Countries of Europe Quiz | 0 | - | 5.00 | 3,717,626 |
| Countries of South America | 0 | - | 5.00 | 914,897 |
| Countries of Oceania | 0 | - | 5.00 | 1,040,636 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,848,657 |
| Landlocked Countries | 0 | - | 4.99 | 413,703 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,926,981 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,627 |
| Himalayan Countries | 0 | - | 4.95 | 135,391 |
| Andean Countries | 0 | - | 4.94 | 82,837 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,232 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,228 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,918 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,620 |
| Danube Countries | 0 | - | 4.97 | 71,090 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,774 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,543 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,500 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,417 |
| European Landlocked Countries | 0 | - | 4.99 | 145,762 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,224 |
| Countries with the Most Species | 0 | - | 4.99 | 95,246 |
| Countries 197 to 205 | 0 | - | 4.87 | 69,360 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,201 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,371 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,961 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,580 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,954 |
| Countries in the Alps | 0 | - | 4.86 | 116,835 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,580 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,273 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,017 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,428 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,179 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,010 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,588 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,763 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,324 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,067 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,198 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,046 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,458 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,754 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,759 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,088 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,653 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,255 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,777 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,340 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,696 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,607 |
| Largest Countries By Category | 0 | - | 4.97 | 156,773 |
| Countries by Countries | 0 | - | 4.96 | 62,264 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,396 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,963 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,333 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,776 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,105 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,143 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,887 |
| Island Countries | 0 | - | 4.99 | 707,662 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,564 |
| Northernmost Countries | 0 | - | 4.99 | 357,771 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,011,876 |
| "Land" Countries | 0 | - | 4.98 | 333,677 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,362,539 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,291 |
| Countries with Megacities | 0 | - | 4.99 | 247,016 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,169 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,008 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,593 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,911 |
| Countries by Official Language | 0 | - | 4.95 | 192,790 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,154 |
| Countries in their Native Language | 0 | - | 4.99 | 196,654 |
| Independence from Whom | 0 | - | 4.99 | 209,715 |
| Subdivisions by Country | 0 | - | 4.86 | 50,070 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,773 |
| Megadiverse Countries | 0 | - | 4.97 | 133,907 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,813 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,921 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,431 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,863 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,675 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,008 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,036 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,159 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,218 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,748 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,583 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,427 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,501 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,508 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,684 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,032 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,611 |
| World Map Quiz | 0 | - | 4.81 | 63,502 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,712 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,339 |
| Countries by Founding Story | 0 | - | 4.95 | 76,553 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,368 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,998 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,960 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,793 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,863 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,069 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,282 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,952 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,339 |
| Widest Countries East to West | 0 | - | 4.92 | 128,611 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,218 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,225 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,570 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,696 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,640 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,050 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,051 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,586 |
| Countries with Double Letters | 0 | - | 4.97 | 93,400 |
| Countries that End in N | 0 | - | 4.94 | 156,892 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,700 |
| Countries with Six Letters | 0 | - | 4.93 | 210,378 |
| Countries with W | 0 | - | 4.97 | 158,238 |
| Countries with Z | 0 | - | 4.98 | 287,894 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,564 |
| Countries That End in U | 0 | - | 4.95 | 119,523 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,574 |
| Countries that End in O | 0 | - | 4.92 | 158,565 |
| Countries that End in R | 0 | - | 4.87 | 118,277 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,861 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,052 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,343 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,501 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,032 |
| Countries That End in Y | 0 | - | 4.90 | 185,211 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,390 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,696 |
| Countries that End in I | 0 | - | 4.94 | 134,419 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,207 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,198 |
| Countries That End in NIA | 0 | - | 4.92 | 109,013 |
| Countries That End in BIA | 0 | - | 4.92 | 147,721 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,073 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,491 |
| Countries That End in RIA | 0 | - | 4.93 | 126,090 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,013 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,209 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,532 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,891 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,365 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,933 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,130 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,654 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,517 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,816 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,157 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,821 |
| Countries that End in L | 0 | - | 4.94 | 155,739 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,240 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,988 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,515 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,308 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,438 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,028 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,113 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,920 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,204 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,394 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,533 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,623 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,173 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,423 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,336 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,240 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,685 |
| One Border Countries | 0 | - | 4.98 | 464,439 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,801,545 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,588,532 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,853 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,953 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,900 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,501 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,622 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,286 |
| Countries by National Anthem | 0 | - | 4.93 | 71,032 |
| NATO Countries | 0 | - | 4.98 | 275,825 |
| EU Countries Quiz | 0 | - | 4.99 | 270,001 |
| Recently Independent Countries | 0 | - | 4.98 | 157,995 |
| French-Speaking Countries | 0 | - | 4.85 | 268,823 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,381 |
| Countries That Use the Euro | 0 | - | 4.96 | 103,036 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,993 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,388 |
| German-Speaking Countries | 0 | - | 4.89 | 123,508 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,617 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,317 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,199 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,081 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,151 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,561 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 110,953 |
