| Countries of Europe Quiz | 0 | - | 5.00 | 3,760,673 |
| Countries of South America | 0 | - | 5.00 | 923,776 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,244 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,868,509 |
| Countries with the Highest Life Expectancy | 0 | - | 4.89 | 207,872 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,379,136 |
| Landlocked Countries | 0 | - | 4.99 | 419,536 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,236 |
| Himalayan Countries | 0 | - | 4.95 | 137,682 |
| Andean Countries | 0 | - | 4.95 | 84,065 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,308 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,818 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,932 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,423 |
| Danube Countries | 0 | - | 4.97 | 71,725 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,644 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,119 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,758 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,834 |
| European Landlocked Countries | 0 | - | 4.99 | 146,842 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,211 |
| Countries with the Most Species | 0 | - | 4.99 | 102,986 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,369 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,450 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,611 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,352 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,027 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,420 |
| Countries in the Alps | 0 | - | 4.87 | 117,788 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,202 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,491 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,458 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,120 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,168 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,762 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,354 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,249 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,008 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,610 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,515 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,363 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,974 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,242 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,261 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,301 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,101 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,605 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,634 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,641 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,375 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,031 |
| Largest Countries By Category | 0 | - | 4.97 | 157,754 |
| Countries by Countries | 0 | - | 4.96 | 62,908 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,298 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,173 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,483 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,391 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,712 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,518 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,764 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,477 |
| Island Countries | 0 | - | 4.99 | 710,014 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,722 |
| Northernmost Countries | 0 | - | 4.99 | 360,764 |
| "Land" Countries | 0 | - | 4.98 | 335,941 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,080 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,197 |
| Countries with Megacities | 0 | - | 4.99 | 262,021 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,049 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,088 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,348 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,125 |
| Countries by Official Language | 0 | - | 4.95 | 194,757 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,691 |
| Countries in their Native Language | 0 | - | 4.99 | 198,304 |
| Independence from Whom | 0 | - | 4.99 | 211,474 |
| Subdivisions by Country | 0 | - | 4.86 | 50,313 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,819 |
| Megadiverse Countries | 0 | - | 4.96 | 134,809 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,633 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,213 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,787 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,032 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,774 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,418 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,063 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,879 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,521 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,009 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,124 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,750 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,024 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,814 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,185 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,361 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,362 |
| World Map Quiz | 0 | - | 4.81 | 64,691 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,877 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,091 |
| Countries by Founding Story | 0 | - | 4.95 | 77,123 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,637 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,004 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,725 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,513 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,598 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,743 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,886 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,304 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,340 |
| Widest Countries East to West | 0 | - | 4.92 | 129,425 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,401 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,025 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,017 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,564 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,295 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,611 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,265 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,736 |
| Countries with Double Letters | 0 | - | 4.97 | 95,185 |
| Countries that End in N | 0 | - | 4.95 | 170,185 |
| Countries with Five Letters | 0 | - | 4.96 | 280,831 |
| Countries with Six Letters | 0 | - | 4.94 | 212,625 |
| Countries with W | 0 | - | 4.97 | 159,589 |
| Countries with Z | 0 | - | 4.98 | 290,044 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,825 |
| Countries That End in U | 0 | - | 4.95 | 120,445 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,843 |
| Countries that End in O | 0 | - | 4.92 | 159,230 |
| Countries that End in R | 0 | - | 4.87 | 118,757 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,536 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,441 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,188 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,134 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,732 |
| Countries That End in Y | 0 | - | 4.91 | 185,670 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,344 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,496 |
| Countries that End in I | 0 | - | 4.94 | 134,903 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,255 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,608 |
| Countries That End in NIA | 0 | - | 4.92 | 109,548 |
| Countries That End in BIA | 0 | - | 4.93 | 148,895 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,787 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,117 |
| Countries That End in RIA | 0 | - | 4.93 | 126,572 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,703 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,863 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,303 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,688 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,217 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,367 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,727 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,294 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,195 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,232 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,903 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,613 |
| Countries that End in L | 0 | - | 4.94 | 156,580 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,297 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,165 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,869 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,764 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,812 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,895 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,259 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,699 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,205 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,699 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,631 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,979 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,613 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,707 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,195 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,939 |
| One Border Countries | 0 | - | 4.98 | 468,006 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,824,905 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,618,147 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,613 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,554 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,756 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,322 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,442 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,993 |
| Countries by National Anthem | 0 | - | 4.92 | 71,202 |
| NATO Countries | 0 | - | 4.98 | 279,660 |
| EU Countries Quiz | 0 | - | 4.99 | 273,317 |
| Recently Independent Countries | 0 | - | 4.98 | 159,091 |
| French-Speaking Countries | 0 | - | 4.85 | 270,317 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,779 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,743 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,769 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,351 |
| German-Speaking Countries | 0 | - | 4.91 | 145,423 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,724 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,098 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,382 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,973 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,047 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,449 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,694 |
