| City to Country Quiz #1 | 0 | - | 4.97 | 156,166 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,103 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,148 |
| Landlocked Countries | 0 | - | 4.99 | 424,107 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,754,038 |
| Historical City to Country | 0 | - | 4.85 | 78,785 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,460 |
| Himalayan Countries | 0 | - | 4.94 | 139,630 |
| Andean Countries | 0 | - | 4.94 | 85,111 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,298 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,535 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,865 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,159 |
| Danube Countries | 0 | - | 4.97 | 72,235 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,359 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,660 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,776 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,266 |
| European Landlocked Countries | 0 | - | 4.99 | 147,411 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,021 |
| Countries with the Most Species | 0 | - | 4.99 | 103,447 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,155 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,692 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,803 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,717 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,447 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,867 |
| Countries in the Alps | 0 | - | 4.87 | 118,523 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,177 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,508 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,830 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,840 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,763 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,109 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,954 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,698 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,319 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,032 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,775 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,640 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,409 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,652 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,742 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,425 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,489 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,378 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,429 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,032 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,732 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,404 |
| Largest Countries By Category | 0 | - | 4.97 | 158,583 |
| Countries by Countries | 0 | - | 4.96 | 63,466 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,037 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,356 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,632 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,939 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,793,889 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,554 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,196 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,703 |
| Island Countries | 0 | - | 4.99 | 711,898 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,052,829 |
| Northernmost Countries | 0 | - | 4.99 | 363,231 |
| Countries of South America | 0 | - | 5.00 | 930,337 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,749 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,295 |
| "Land" Countries | 0 | - | 4.98 | 337,957 |
| City to Country Quiz #2 | 0 | - | 4.78 | 108,613 |
| City to Country Quiz #4 | 0 | - | 4.61 | 84,293 |
| City to Country Quiz #5 | 0 | - | 4.74 | 81,213 |
| City to Country Quiz #6 | 0 | - | 4.56 | 65,635 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,389,609 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,571 |
| Countries with Megacities | 0 | - | 4.99 | 266,068 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,340 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,796 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,604 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,921 |
| Countries by Official Language | 0 | - | 4.95 | 195,700 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,201 |
| Countries in their Native Language | 0 | - | 4.99 | 199,473 |
| Independence from Whom | 0 | - | 4.99 | 212,658 |
| Subdivisions by Country | 0 | - | 4.87 | 50,547 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,146 |
| Megadiverse Countries | 0 | - | 4.96 | 135,167 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,553 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,467 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,364 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,169 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,400 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,723 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,823 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,479 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,760 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,215 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,129 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,281 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,348 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,072 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,489 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,613 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,916 |
| World Map Quiz | 0 | - | 4.81 | 65,403 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,421 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,546 |
| Countries by Founding Story | 0 | - | 4.95 | 77,617 |
| Countries by Road Signs | 0 | - | 4.98 | 54,230 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,905 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,797 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,392 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,097 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,240 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,373 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,566 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,604 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,682 |
| Widest Countries East to West | 0 | - | 4.92 | 130,264 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,547 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,057 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,450 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,955 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,829 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,325 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,455 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,859 |
| Countries with Double Letters | 0 | - | 4.96 | 96,740 |
| Countries that End in N | 0 | - | 4.95 | 171,624 |
| Countries with Five Letters | 0 | - | 4.96 | 283,293 |
| Countries with Six Letters | 0 | - | 4.94 | 214,075 |
| Countries with W | 0 | - | 4.96 | 160,692 |
| Countries with Z | 0 | - | 4.98 | 292,040 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,053 |
| Countries That End in U | 0 | - | 4.95 | 121,050 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,836 |
| Countries that End in O | 0 | - | 4.92 | 159,692 |
| Countries that End in R | 0 | - | 4.87 | 119,092 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,844 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,520 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,968 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,681 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,601 |
| Countries That End in Y | 0 | - | 4.91 | 186,012 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,231 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,104 |
| Countries that End in I | 0 | - | 4.94 | 135,228 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,420 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,954 |
| Countries That End in NIA | 0 | - | 4.92 | 109,941 |
| Countries That End in BIA | 0 | - | 4.93 | 149,425 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,364 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,646 |
| Countries That End in RIA | 0 | - | 4.93 | 126,955 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,243 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,168 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,986 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,422 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,975 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,710 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,212 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,501 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,745 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,560 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,540 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 54,236 |
| Countries that End in L | 0 | - | 4.94 | 157,008 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,845 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,309 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,162 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,954 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,322 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,088 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,770 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,080 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,182 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,767 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,139 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,451,680 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,848 |
| One Border Countries | 0 | - | 4.98 | 471,114 |
| 48 Asian Countries, 48 Cities | 0 | - | 4.52 | 23,055 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,843,041 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,644,868 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,149 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,674 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,480 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,757 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,020 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,441 |
| Countries by National Anthem | 0 | - | 4.92 | 71,366 |
| NATO Countries | 0 | - | 4.98 | 282,630 |
| EU Countries Quiz | 0 | - | 4.99 | 276,898 |
| Recently Independent Countries | 0 | - | 4.98 | 159,749 |
| French-Speaking Countries | 0 | - | 4.85 | 271,366 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,987 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,285 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 290,419 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 275,848 |
| German-Speaking Countries | 0 | - | 4.92 | 145,920 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,137 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,431 |
