| Countries of the World in 1900 | 0 | - | 4.89 | 83,291 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 192,856 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 148,557 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,592 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,411 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 56,803 |
| Independence from Whom | 0 | - | 4.99 | 209,444 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,578 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,937 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,583 |
| Countries by Founding Story | 0 | - | 4.95 | 76,440 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.99 | 68,128 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,797,182 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,583,250 |
| Recently Independent Countries | 0 | - | 4.98 | 157,854 |
| Countries by Former Name | 0 | - | 4.99 | 124,139 |
| Historical City to Country | 0 | - | 4.84 | 78,080 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,847,720 |
| Landlocked Countries | 0 | - | 4.99 | 412,840 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,621 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,709,369 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,027 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,136 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,174 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,498 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,476 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,709 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,087 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,218 |
| Himalayan Countries | 0 | - | 4.95 | 135,040 |
| Andean Countries | 0 | - | 4.94 | 82,654 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,077 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 122,974 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,748 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,454 |
| Danube Countries | 0 | - | 4.97 | 70,989 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,633 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,450 |
| Countries with the Worst Passports | 0 | - | 4.93 | 82,278 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,186 |
| European Landlocked Countries | 0 | - | 4.99 | 145,662 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,041 |
| Countries with the Most Species | 0 | - | 4.99 | 95,181 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,186 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,745 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,172 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,331 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,906 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,506 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,862 |
| Countries in the Alps | 0 | - | 4.87 | 116,678 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,461 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,058 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,935 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,317 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,061 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,933 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,463 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,682 |
| Largest Country by Body of Water | 0 | - | 4.95 | 55,204 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 61,964 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,164 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 40,994 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,357 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,667 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,669 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,852 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,561 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,198 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,658 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 238,809 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,348 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,531 |
| Largest Countries By Category | 0 | - | 4.97 | 156,599 |
| Countries by Countries | 0 | - | 4.96 | 62,159 |
| Pixelated World Map | 0 | - | 5.00 | 141,761 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,203 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,238 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,930 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,155 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,306 |
| All Countries by Population With a Map | 0 | - | 4.98 | 106,369 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 97,994 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,648 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 81,220 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 322,972 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,813 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 400,962 |
| Island Countries | 0 | - | 4.99 | 707,212 |
| Modern-Day Countries of the Khmer Empire on a Map | 0 | - | 4.74 | 45,086 |
| Modern-Day Countries of the Mayan Civilization | 0 | - | 4.77 | 32,889 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,038,271 |
| Northernmost Countries | 0 | - | 4.99 | 357,214 |
| Countries of South America | 0 | - | 5.00 | 913,301 |
| Countries of Oceania | 0 | - | 5.00 | 1,038,488 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,844,984 |
| "Land" Countries | 0 | - | 4.98 | 333,403 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,456 |
| Countries by Independence Day | 0 | - | 4.56 | 52,582 |
| Former Countries by Capital | 0 | - | 4.45 | 126,956 |
| Former Countries | 0 | - | 4.75 | 132,584 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,359,922 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 104,282 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 77,907 |
| Battle to Country | 0 | - | 4.91 | 52,423 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,749 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,850 |
| Countries with Megacities | 0 | - | 4.99 | 246,145 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,768 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,727 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,235 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,662 |
| Countries by Official Language | 0 | - | 4.95 | 192,578 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,851 |
| Countries in their Native Language | 0 | - | 4.99 | 196,457 |
| Subdivisions by Country | 0 | - | 4.86 | 50,032 |
| Megadiverse Countries | 0 | - | 4.97 | 133,827 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,641 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,875 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,370 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,832 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,529 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,058 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,173 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,711 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,365 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,359 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,423 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,441 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,600 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,977 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,326 |
| World Map Quiz | 0 | - | 4.81 | 63,349 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,187 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,209 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 62,998 |
| Countries by Road Signs | 0 | - | 4.98 | 52,969 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,141 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,874 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,844 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,489 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,757 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 92,956 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,166 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,875 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,248 |
| Widest Countries East to West | 0 | - | 4.92 | 128,515 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,191 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,072 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,518 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,619 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,515 |
| Countries with the Most Desert | 0 | - | 4.93 | 126,944 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,030 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,551 |
| Countries With the Tallest People | 0 | - | 4.91 | 94,465 |
| Countries with Double Letters | 0 | - | 4.97 | 93,208 |
| Countries that End in N | 0 | - | 4.94 | 156,275 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,469 |
| Countries with Six Letters | 0 | - | 4.93 | 210,168 |
| Countries with W | 0 | - | 4.97 | 158,087 |
| Countries with Z | 0 | - | 4.98 | 287,300 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,422 |
| Countries That End in U | 0 | - | 4.95 | 119,439 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,320 |
| Countries that End in O | 0 | - | 4.92 | 158,471 |
| Countries that End in R | 0 | - | 4.86 | 118,195 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,805 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,853 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,178 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,374 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,562 |
| Countries That End in Y | 0 | - | 4.90 | 185,147 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,166 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,540 |
| Countries that End in I | 0 | - | 4.94 | 134,296 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,003 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,136 |
| Countries That End in NIA | 0 | - | 4.92 | 108,925 |
| Countries That End in BIA | 0 | - | 4.92 | 147,605 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 165,960 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,392 |
| Countries That End in RIA | 0 | - | 4.93 | 126,003 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,913 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 224,951 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,421 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,798 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,232 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,866 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,017 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,543 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,384 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,767 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,006 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,678 |
| Countries that End in L | 0 | - | 4.94 | 155,635 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,636 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,965 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,450 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,216 |
