| Word Scramble - Countries | 0 | - | 4.88 | 2,128,361 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 168,739 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,892 |
| Anagram Chain - Countries | 0 | - | 4.98 | 117,945 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 66,229 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,660,106 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,974,906 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 454,121 |
| Countries with Four Letters | 0 | - | 4.99 | 426,491 |
| Countries but all Vowels are Changed to O | 0 | - | 4.91 | 71,349 |
| Landlocked Countries | 0 | - | 4.99 | 427,306 |
| Solve the Secret Capital City | 0 | - | 4.80 | 164,740 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 202,320 |
| Top Five Countries By Category #3 | 0 | - | 4.83 | 184,685 |
| Country Chain | 0 | - | 4.96 | 218,674 |
| Countries by Emojis | 0 | - | 4.99 | 242,866 |
| Countries With One Word And Two O's | 0 | - | 4.92 | 56,718 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 324,396 |
| Islands by Country #1 | 0 | - | 4.90 | 176,502 |
| Regions of Countries #1 | 0 | - | 4.96 | 160,342 |
| Regions of Countries #2 | 0 | - | 4.95 | 124,661 |
| Regions of Countries #3 | 0 | - | 4.85 | 91,474 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,812,937 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 145,377 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 60,122 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,988 |
| Name a Valid Country #3 | 0 | - | 4.99 | 266,407 |
| Name a Valid Country #1 | 0 | - | 4.99 | 296,147 |
| Name a Valid Country #2 | 0 | - | 4.98 | 254,637 |
| Name a Valid Country #4 | 0 | - | 4.97 | 259,625 |
| Name a Valid Country #5 | 0 | - | 4.99 | 210,439 |
| Name a Valid Country #6 | 0 | - | 4.95 | 145,671 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 745,727 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,945 |
| Himalayan Countries | 0 | - | 4.93 | 140,855 |
| Andean Countries | 0 | - | 4.94 | 85,816 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,929 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,508 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,473 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,702 |
| Danube Countries | 0 | - | 4.97 | 72,564 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,807 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,977 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,455 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,927 |
| European Landlocked Countries | 0 | - | 4.99 | 147,772 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,547 |
| Countries with the Most Species | 0 | - | 4.99 | 103,652 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,649 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,816 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,955 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,929 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,683 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,139 |
| Countries in the Alps | 0 | - | 4.87 | 118,985 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 103,014 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,144 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,056 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,180 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,132 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,395 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,603 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,999 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,517 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,317 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,954 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,832 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,681 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,929 |
| Countries with the Most Grassland | 0 | - | 4.94 | 78,027 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,157 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,741 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 76,504 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,849 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,338 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,511 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,620 |
| Largest Countries By Category | 0 | - | 4.97 | 159,102 |
| Countries by Countries | 0 | - | 4.97 | 63,814 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,455 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,451 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,238 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,665 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 377,061 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,405 |
| Island Countries | 0 | - | 4.99 | 713,033 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,056,252 |
| Northernmost Countries | 0 | - | 4.99 | 364,632 |
| Countries of South America | 0 | - | 5.00 | 934,358 |
| Countries of Oceania | 0 | - | 5.00 | 1,065,631 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,893,253 |
| "Land" Countries | 0 | - | 4.98 | 339,030 |
| Five Most Inland Capital Cities by Continent | 0 | - | 4.92 | 13,799 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 181,908 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 89,828 |
| American Countries with the Shortest Names | 0 | - | 4.97 | 121,777 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 111,214 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 90,024 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,397,299 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 49,696 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,885 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 238,633 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 227,465 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 194,040 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 124,358 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 103,635 |
| Five Countries by a Single Word by Continent | 0 | - | 4.91 | 78,872 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 112,702 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 196,352 |
| Random Countries by Borders | 0 | - | 4.99 | 83,203 |
| Random Name a Valid Country | 0 | - | 4.99 | 206,912 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,518 |
| Countries with Megacities | 0 | - | 4.99 | 267,900 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,173 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,348 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,498 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,451 |
| Countries by Official Language | 0 | - | 4.95 | 196,238 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,967 |
| Countries in their Native Language | 0 | - | 4.99 | 199,968 |
| Independence from Whom | 0 | - | 4.99 | 213,422 |
| Subdivisions by Country | 0 | - | 4.87 | 50,670 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,677 |
| Megadiverse Countries | 0 | - | 4.96 | 149,210 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,143 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,583 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,813 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,262 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,485 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,925 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,291 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,631 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,171 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,288 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,796 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,492 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,511 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,221 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,647 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,981 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,758 |
| World Map Quiz | 0 | - | 4.81 | 65,932 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 140,465 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,822 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,534 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,245 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,714 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,957 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,564 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,671 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,862 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,767 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,954 |
| Widest Countries East to West | 0 | - | 4.92 | 130,862 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,630 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,410 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,568 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,167 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,124 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,620 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,537 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,923 |
| Countries with Double Letters | 0 | - | 4.96 | 97,660 |
| Countries that End in N | 0 | - | 4.95 | 172,653 |
| Countries with Five Letters | 0 | - | 4.96 | 284,682 |
| Countries with Six Letters | 0 | - | 4.94 | 214,987 |
| Countries with W | 0 | - | 4.96 | 161,331 |
| Countries with Z | 0 | - | 4.98 | 293,038 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,693 |
| Countries That End in U | 0 | - | 4.95 | 121,401 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,448 |
| Countries that End in O | 0 | - | 4.92 | 160,377 |
| Countries that End in R | 0 | - | 4.87 | 119,284 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,065 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,172 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 186,243 |
| Countries by Last Two Letters | 0 | - | 4.85 | 136,214 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,825 |
| Countries That End in Y | 0 | - | 4.91 | 186,178 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 199,335 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,433 |
| Countries that End in I | 0 | - | 4.94 | 135,434 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 185,311 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,151 |
| Countries That End in NIA | 0 | - | 4.92 | 110,163 |
| Countries That End in BIA | 0 | - | 4.93 | 149,747 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,946 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,916 |
| Countries That End in RIA | 0 | - | 4.93 | 127,159 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,552 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,966 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,404 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,871 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,421 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,930 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,469 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,613 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 126,069 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,741 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,632 |
