| Countries of Europe Quiz | 0 | - | 5.00 | 3,801,156 |
| Countries of South America | 0 | - | 5.00 | 931,926 |
| Countries of Oceania | 0 | - | 5.00 | 1,062,462 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,887,658 |
| Landlocked Countries | 0 | - | 4.99 | 425,186 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,842,211 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,986 |
| Himalayan Countries | 0 | - | 4.93 | 140,020 |
| Andean Countries | 0 | - | 4.94 | 85,315 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,471 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,834 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,043 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,332 |
| Danube Countries | 0 | - | 4.97 | 72,322 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,499 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,771 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,992 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,500 |
| European Landlocked Countries | 0 | - | 4.99 | 147,543 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,205 |
| Countries with the Most Species | 0 | - | 4.99 | 103,525 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,332 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,752 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,856 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,794 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,530 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,963 |
| Countries in the Alps | 0 | - | 4.87 | 118,693 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,496 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,761 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,923 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,971 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,888 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,196 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,334 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,814 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,382 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,129 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,828 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,700 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,506 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,737 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,835 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,709 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,566 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,711 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,607 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,485 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,018 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,477 |
| Largest Countries By Category | 0 | - | 4.97 | 158,783 |
| Countries by Countries | 0 | - | 4.96 | 63,584 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,193 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,382 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,654 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,054 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,024 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,531 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,421 |
| Island Countries | 0 | - | 4.99 | 712,362 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,193 |
| Northernmost Countries | 0 | - | 4.99 | 363,759 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,030,643 |
| "Land" Countries | 0 | - | 4.98 | 338,285 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,392,505 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,011 |
| Countries with Megacities | 0 | - | 4.99 | 266,850 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,731 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,037 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,046 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,164 |
| Countries by Official Language | 0 | - | 4.95 | 195,905 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,510 |
| Countries in their Native Language | 0 | - | 4.99 | 199,657 |
| Independence from Whom | 0 | - | 4.99 | 212,960 |
| Subdivisions by Country | 0 | - | 4.87 | 50,592 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,362 |
| Megadiverse Countries | 0 | - | 4.96 | 135,249 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,871 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,515 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,444 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,212 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,551 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,816 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,048 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,546 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,820 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,245 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,433 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,351 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,416 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,128 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,559 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,680 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,220 |
| World Map Quiz | 0 | - | 4.81 | 65,609 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,011 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,665 |
| Countries by Founding Story | 0 | - | 4.95 | 77,765 |
| Countries by Road Signs | 0 | - | 4.98 | 54,310 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,157 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,008 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,502 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,434 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,378 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,480 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,678 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,656 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,561 |
| Widest Countries East to West | 0 | - | 4.92 | 130,403 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,585 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,195 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,497 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,024 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,939 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,428 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,482 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,885 |
| Countries with Double Letters | 0 | - | 4.96 | 96,987 |
| Countries that End in N | 0 | - | 4.95 | 171,851 |
| Countries with Five Letters | 0 | - | 4.96 | 283,644 |
| Countries with Six Letters | 0 | - | 4.94 | 214,378 |
| Countries with W | 0 | - | 4.96 | 160,882 |
| Countries with Z | 0 | - | 4.98 | 292,340 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,237 |
| Countries That End in U | 0 | - | 4.95 | 121,154 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,038 |
| Countries that End in O | 0 | - | 4.92 | 160,179 |
| Countries that End in R | 0 | - | 4.87 | 119,155 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,912 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,760 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,105 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,782 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,714 |
| Countries That End in Y | 0 | - | 4.91 | 186,074 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,400 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,233 |
| Countries that End in I | 0 | - | 4.94 | 135,293 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,563 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,031 |
| Countries That End in NIA | 0 | - | 4.92 | 110,022 |
| Countries That End in BIA | 0 | - | 4.93 | 149,547 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,481 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,737 |
| Countries That End in RIA | 0 | - | 4.93 | 127,033 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,350 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,486 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,124 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,561 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,124 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,782 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,299 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,527 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,865 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,635 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,669 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,365 |
| Countries that End in L | 0 | - | 4.94 | 157,090 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,830 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,338 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,402 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,917 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,407 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,350 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,095 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,404 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,207 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,915 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,177 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,221 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,812 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,209 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,453,412 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,306 |
| One Border Countries | 0 | - | 4.98 | 471,738 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,847,020 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,650,544 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,284 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,945 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,610 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,866 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,172 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,564 |
| Countries by National Anthem | 0 | - | 4.93 | 71,398 |
| NATO Countries | 0 | - | 4.98 | 283,205 |
| EU Countries Quiz | 0 | - | 4.99 | 277,601 |
| Recently Independent Countries | 0 | - | 4.98 | 160,268 |
| French-Speaking Countries | 0 | - | 4.85 | 271,590 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,026 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,633 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,151 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,698 |
| German-Speaking Countries | 0 | - | 4.92 | 146,001 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,217 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,500 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 167,949 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,215 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,220 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,766 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 113,031 |
