| Countries of Europe Quiz | 0 | - | 5.00 | 3,762,359 |
| Countries of South America | 0 | - | 5.00 | 924,101 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,787 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,869,412 |
| Landlocked Countries | 0 | - | 4.99 | 419,763 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,400,355 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,340 |
| Himalayan Countries | 0 | - | 4.95 | 137,775 |
| Andean Countries | 0 | - | 4.95 | 84,103 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,341 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,881 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,972 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,449 |
| Danube Countries | 0 | - | 4.97 | 71,746 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,672 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,145 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,813 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,890 |
| European Landlocked Countries | 0 | - | 4.99 | 146,869 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,250 |
| Countries with the Most Species | 0 | - | 4.99 | 103,014 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,408 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,458 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,622 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,376 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,047 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,446 |
| Countries in the Alps | 0 | - | 4.87 | 117,830 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,223 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,556 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,473 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,347 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,215 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,782 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,377 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,262 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,025 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,629 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,526 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,375 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,996 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,265 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,284 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,369 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,121 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,630 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,670 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,773 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,459 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,044 |
| Largest Countries By Category | 0 | - | 4.97 | 157,796 |
| Countries by Countries | 0 | - | 4.97 | 62,931 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,337 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,184 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,490 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,419 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,720 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,836 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,816 |
| Island Countries | 0 | - | 4.99 | 710,112 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,047,015 |
| Northernmost Countries | 0 | - | 4.99 | 360,888 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,022,131 |
| "Land" Countries | 0 | - | 4.98 | 336,003 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,730 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,273 |
| Countries with Megacities | 0 | - | 4.99 | 262,504 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,104 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,125 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,405 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,173 |
| Countries by Official Language | 0 | - | 4.95 | 194,805 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,761 |
| Countries in their Native Language | 0 | - | 4.99 | 198,351 |
| Independence from Whom | 0 | - | 4.99 | 211,545 |
| Subdivisions by Country | 0 | - | 4.86 | 50,329 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,859 |
| Megadiverse Countries | 0 | - | 4.96 | 134,827 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,676 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,222 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,794 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,039 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,817 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,438 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,099 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,896 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,531 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,021 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,185 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,764 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,042 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,829 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,208 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,375 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,441 |
| World Map Quiz | 0 | - | 4.81 | 64,736 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,002 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,124 |
| Countries by Founding Story | 0 | - | 4.95 | 77,144 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,663 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,021 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,753 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,603 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,622 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,769 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,906 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,319 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,358 |
| Widest Countries East to West | 0 | - | 4.92 | 129,444 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,406 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,063 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,033 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,585 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,322 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,641 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,280 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,743 |
| Countries with Double Letters | 0 | - | 4.97 | 95,261 |
| Countries that End in N | 0 | - | 4.95 | 170,269 |
| Countries with Five Letters | 0 | - | 4.96 | 281,011 |
| Countries with Six Letters | 0 | - | 4.94 | 212,702 |
| Countries with W | 0 | - | 4.97 | 159,638 |
| Countries with Z | 0 | - | 4.98 | 290,476 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,885 |
| Countries That End in U | 0 | - | 4.95 | 120,474 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,897 |
| Countries that End in O | 0 | - | 4.92 | 159,252 |
| Countries that End in R | 0 | - | 4.87 | 118,772 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,547 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,494 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,257 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,162 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,776 |
| Countries That End in Y | 0 | - | 4.91 | 185,686 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,431 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,525 |
| Countries that End in I | 0 | - | 4.94 | 134,913 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,619 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,627 |
| Countries That End in NIA | 0 | - | 4.92 | 109,573 |
| Countries That End in BIA | 0 | - | 4.93 | 148,919 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,821 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,144 |
| Countries That End in RIA | 0 | - | 4.93 | 126,594 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,730 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,936 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,336 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,715 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,245 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,386 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,744 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,323 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,238 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,246 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,922 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,649 |
| Countries that End in L | 0 | - | 4.94 | 156,605 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,446 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,172 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,882 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,783 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,828 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,940 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,308 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,728 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,236 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,728 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,649 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,991 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,617 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,726 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,582 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,062 |
| One Border Countries | 0 | - | 4.98 | 468,189 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,825,983 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,619,344 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,645 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,616 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,804 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,343 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,465 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,015 |
| Countries by National Anthem | 0 | - | 4.92 | 71,212 |
| NATO Countries | 0 | - | 4.98 | 279,811 |
| EU Countries Quiz | 0 | - | 4.99 | 273,473 |
| Recently Independent Countries | 0 | - | 4.98 | 159,144 |
| French-Speaking Countries | 0 | - | 4.85 | 270,362 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,790 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,824 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,920 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,551 |
| German-Speaking Countries | 0 | - | 4.91 | 145,471 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,752 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,125 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,481 |
| Top Five Countries by Religion | 0 | - | 4.93 | 171,075 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,139 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,488 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,732 |
| Olympic Host Countries | 0 | - | 4.98 | 200,590 |
