| Countries of the World Quiz | 0 | - | 5.00 | 47,411,031 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,707 |
| Landlocked Countries | 0 | - | 4.99 | 419,872 |
| Countries with Glaciers | 0 | - | 4.97 | 105,384 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,518 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,623 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,763,424 |
| Countries of Asia with Two or More Words | 0 | - | 4.96 | 126,806 |
| Asian Countries Ending in "IA" | 0 | - | 4.96 | 107,436 |
| African Countries with the Shortest Names | 0 | - | 4.98 | 153,406 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,407 |
| Himalayan Countries | 0 | - | 4.95 | 137,842 |
| Andean Countries | 0 | - | 4.95 | 84,130 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,356 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,915 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,994 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,464 |
| Danube Countries | 0 | - | 4.97 | 71,758 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,687 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,153 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,840 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,918 |
| European Landlocked Countries | 0 | - | 4.99 | 146,882 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,265 |
| Countries with the Most Species | 0 | - | 4.99 | 103,026 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,429 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,462 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,634 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,387 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,063 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,460 |
| Countries in the Alps | 0 | - | 4.87 | 117,859 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,493 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,579 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,481 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,366 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,227 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,792 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,392 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,271 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,034 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,641 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,532 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,381 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,004 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,286 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,297 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,410 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,128 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,634 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,692 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,848 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,492 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,054 |
| Largest Countries By Category | 0 | - | 4.97 | 157,813 |
| Countries by Countries | 0 | - | 4.97 | 62,940 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,364 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,186 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,495 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,873 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,741 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,440 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,819 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,866 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,880 |
| Island Countries | 0 | - | 4.99 | 710,153 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,047,139 |
| Northernmost Countries | 0 | - | 4.99 | 360,947 |
| Countries of South America | 0 | - | 5.00 | 924,250 |
| Countries of Oceania | 0 | - | 5.00 | 1,053,038 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,869,849 |
| "Land" Countries | 0 | - | 4.98 | 336,041 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,378,070 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 48,626 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,157 |
| Shortest Country Name A-Z | 0 | - | 5.00 | 236,788 |
| "Stan" Countries - Map Quiz | 0 | - | 4.98 | 135,697 |
| Elements Named for Countries | 0 | - | 4.53 | 24,678 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,303 |
| Countries with Megacities | 0 | - | 4.99 | 262,686 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,141 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,142 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,439 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,189 |
| Countries by Official Language | 0 | - | 4.95 | 194,828 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,786 |
| Countries in their Native Language | 0 | - | 4.99 | 198,372 |
| Independence from Whom | 0 | - | 4.99 | 211,574 |
| Subdivisions by Country | 0 | - | 4.86 | 50,334 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,878 |
| Megadiverse Countries | 0 | - | 4.96 | 134,836 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,698 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,226 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,803 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,044 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,839 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,446 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,115 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,901 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,535 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,024 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,224 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,770 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,053 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,837 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,216 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,385 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,485 |
| World Map Quiz | 0 | - | 4.81 | 64,765 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,064 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,137 |
| Countries by Founding Story | 0 | - | 4.95 | 77,154 |
| Countries by Road Signs | 0 | - | 4.98 | 53,750 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,684 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,038 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,768 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,624 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,638 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,781 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,915 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,329 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,371 |
| Widest Countries East to West | 0 | - | 4.92 | 129,452 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,406 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,087 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,036 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,595 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,336 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,653 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,286 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,748 |
| Countries with Double Letters | 0 | - | 4.97 | 95,290 |
| Countries that End in N | 0 | - | 4.95 | 170,301 |
| Countries with Five Letters | 0 | - | 4.96 | 281,079 |
| Countries with Six Letters | 0 | - | 4.94 | 212,723 |
| Countries with W | 0 | - | 4.97 | 159,652 |
| Countries with Z | 0 | - | 4.98 | 290,517 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,906 |
| Countries That End in U | 0 | - | 4.95 | 120,485 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,917 |
| Countries that End in O | 0 | - | 4.92 | 159,264 |
| Countries that End in R | 0 | - | 4.87 | 118,779 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,553 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,517 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,274 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,174 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,786 |
| Countries That End in Y | 0 | - | 4.91 | 185,694 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,450 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,541 |
| Countries that End in I | 0 | - | 4.94 | 134,924 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,652 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,638 |
| Countries That End in NIA | 0 | - | 4.92 | 109,583 |
| Countries That End in BIA | 0 | - | 4.93 | 148,932 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,834 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,160 |
| Countries That End in RIA | 0 | - | 4.93 | 126,599 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,739 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,966 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,351 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,738 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,269 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,392 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,752 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,335 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,245 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,252 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,937 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,663 |
| Countries that End in L | 0 | - | 4.94 | 156,617 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,518 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,173 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,893 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,790 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,842 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,973 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,321 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,745 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,257 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,755 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,657 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,999 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,623 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,737 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,783 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,107 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,826,512 |
| One Border Countries | 0 | - | 4.98 | 468,274 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,620,214 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,436 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,262 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,636 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,345 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,663 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,650 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,819 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,355 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,484 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,028 |
