| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,625,467 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,830,067 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,485,669 |
| Word Scramble - Countries | 0 | - | 4.87 | 2,102,403 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 451,010 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,873 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,483 |
| Anagram Chain - Countries | 0 | - | 4.98 | 116,570 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,984 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 195,365 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 150,952 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 138,107 |
| Countries with Four Letters | 0 | - | 4.99 | 422,654 |
| Countries but all Vowels are Changed to O | 0 | - | 4.91 | 69,671 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 64,678 |
| Landlocked Countries | 0 | - | 4.99 | 420,835 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 200,767 |
| Top Five Countries By Category #3 | 0 | - | 4.83 | 182,732 |
| Country Chain | 0 | - | 4.96 | 217,146 |
| Countries by Emojis | 0 | - | 4.99 | 239,852 |
| Countries With One Word And Two O's | 0 | - | 4.92 | 55,972 |
| Pixelated World Map | 0 | - | 5.00 | 143,443 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 320,824 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,807 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 57,463 |
| Islands by Country #1 | 0 | - | 4.88 | 175,328 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,561 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,915 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,747 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,769,882 |
| Can You Name These 50 Random Countries? | 0 | - | 4.99 | 216,895 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 82,205 |
| Name a Valid Country #3 | 0 | - | 4.99 | 263,152 |
| Name a Valid Country #1 | 0 | - | 4.99 | 290,144 |
| Name a Valid Country #2 | 0 | - | 4.98 | 250,855 |
| Name a Valid Country #4 | 0 | - | 4.97 | 255,719 |
| Name a Valid Country #5 | 0 | - | 4.99 | 207,123 |
| Name a Valid Country #6 | 0 | - | 4.94 | 129,514 |
| Name a Valid Country #7 | 0 | - | 4.91 | 129,361 |
| Name a Valid Country #8 | 0 | - | 4.86 | 98,723 |
| Countries by Languages in 90 Seconds | 0 | - | 4.94 | 721,212 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,905 |
| Himalayan Countries | 0 | - | 4.95 | 138,221 |
| Andean Countries | 0 | - | 4.95 | 84,332 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,560 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,443 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,182 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,606 |
| Danube Countries | 0 | - | 4.97 | 71,869 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,842 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,273 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,044 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,512 |
| European Landlocked Countries | 0 | - | 4.99 | 147,006 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,423 |
| Countries with the Most Species | 0 | - | 4.99 | 103,128 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,574 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,525 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,669 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,461 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,138 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,539 |
| Countries in the Alps | 0 | - | 4.87 | 118,009 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,040 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,794 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,563 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,480 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,351 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,851 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,504 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,371 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,098 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,726 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,574 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,433 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,097 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,371 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,394 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,615 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,195 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,716 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,861 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,357 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,758 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,133 |
| Largest Countries By Category | 0 | - | 4.97 | 157,979 |
| Countries by Countries | 0 | - | 4.96 | 63,052 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,507 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,228 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,522 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,843 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,547 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,554 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,148 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,461 |
| Island Countries | 0 | - | 4.99 | 710,561 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,307 |
| Northernmost Countries | 0 | - | 4.99 | 361,395 |
| Countries of South America | 0 | - | 5.00 | 925,529 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,624 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,872,982 |
| "Land" Countries | 0 | - | 4.98 | 336,857 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 180,983 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 89,234 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,152 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,776 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 89,499 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,566 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 105,110 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,748 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,233 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 236,199 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 225,160 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 192,278 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 122,892 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 139,694 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,799 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 79,719 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 103,117 |
| Random Countries by Borders | 0 | - | 4.99 | 82,486 |
| Random Name a Valid Country | 0 | - | 4.99 | 205,146 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,974 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,577 |
| Countries with Megacities | 0 | - | 4.99 | 263,697 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,416 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,303 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,689 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,344 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 89,389 |
| Countries by Official Language | 0 | - | 4.95 | 195,001 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,041 |
| Countries in their Native Language | 0 | - | 4.99 | 198,509 |
| Independence from Whom | 0 | - | 4.99 | 211,790 |
| Subdivisions by Country | 0 | - | 4.86 | 50,379 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,163 |
| Megadiverse Countries | 0 | - | 4.96 | 134,911 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,859 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,280 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,861 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,067 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,959 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,502 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,272 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,960 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,584 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,048 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,414 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,807 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,119 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,897 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,267 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,429 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 101,532 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,805 |
| World Map Quiz | 0 | - | 4.81 | 64,922 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,571 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,226 |
| Countries by Founding Story | 0 | - | 4.95 | 77,253 |
| Countries by Road Signs | 0 | - | 4.98 | 53,865 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,850 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,134 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,855 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,868 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,763 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,896 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,199 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,376 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,472 |
| Widest Countries East to West | 0 | - | 4.92 | 129,544 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,421 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,220 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,076 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,661 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,447 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,730 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,326 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,772 |
| Countries with Double Letters | 0 | - | 4.97 | 95,809 |
| Countries that End in N | 0 | - | 4.95 | 170,755 |
| Countries with Five Letters | 0 | - | 4.96 | 281,828 |
| Countries with Six Letters | 0 | - | 4.94 | 213,161 |
| Countries with W | 0 | - | 4.97 | 160,050 |
| Countries with Z | 0 | - | 4.98 | 291,010 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,384 |
| Countries That End in U | 0 | - | 4.95 | 120,684 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,180 |
| Countries that End in O | 0 | - | 4.92 | 159,398 |
| Countries that End in R | 0 | - | 4.87 | 118,870 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,642 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,783 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,457 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,301 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,009 |
| Countries That End in Y | 0 | - | 4.91 | 185,789 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,645 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,683 |
| Countries that End in I | 0 | - | 4.94 | 135,005 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,824 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,725 |
| Countries That End in NIA | 0 | - | 4.92 | 109,669 |
