| Countries of Europe Quiz | 0 | - | 5.00 | 3,738,261 |
| Countries of South America | 0 | - | 5.00 | 919,217 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,070 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,857,580 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,137,469 |
| Landlocked Countries | 0 | - | 4.99 | 416,332 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,778 |
| Himalayan Countries | 0 | - | 4.95 | 136,374 |
| Andean Countries | 0 | - | 4.95 | 83,409 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,673 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,899 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,365 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,967 |
| Danube Countries | 0 | - | 4.97 | 71,365 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,157 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,820 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,090 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,040 |
| European Landlocked Countries | 0 | - | 4.99 | 146,097 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,706 |
| Countries with the Most Species | 0 | - | 4.99 | 100,412 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,851 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,314 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,490 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,132 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,788 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,158 |
| Countries in the Alps | 0 | - | 4.86 | 117,291 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,872 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,816 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,233 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,709 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,772 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,222 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,950 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,972 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,773 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,308 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,339 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,189 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,697 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,969 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,975 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,645 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,869 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,405 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,200 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,810 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,487 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,793 |
| Largest Countries By Category | 0 | - | 4.97 | 157,211 |
| Countries by Countries | 0 | - | 4.96 | 62,564 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,833 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,069 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,404 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,056 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,016,723 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,566 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,687 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,529 |
| Island Countries | 0 | - | 4.99 | 708,707 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,042,935 |
| Northernmost Countries | 0 | - | 4.99 | 359,208 |
| "Land" Countries | 0 | - | 4.98 | 334,407 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,369,657 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,182 |
| Countries with Megacities | 0 | - | 4.99 | 248,756 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,044 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,498 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,414 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,443 |
| Countries by Official Language | 0 | - | 4.95 | 193,909 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,400 |
| Countries in their Native Language | 0 | - | 4.99 | 197,547 |
| Independence from Whom | 0 | - | 4.99 | 210,526 |
| Subdivisions by Country | 0 | - | 4.86 | 50,183 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,265 |
| Megadiverse Countries | 0 | - | 4.96 | 134,517 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,747 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,064 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,614 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,940 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,408 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,192 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,520 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,522 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,354 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,801 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,117 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,568 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,667 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,630 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,836 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,184 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,431 |
| World Map Quiz | 0 | - | 4.81 | 64,011 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,186 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,666 |
| Countries by Founding Story | 0 | - | 4.95 | 76,837 |
| Countries by Road Signs | 0 | - | 4.98 | 53,375 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,001 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,628 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,363 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,611 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,228 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,424 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,598 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,129 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,617 |
| Widest Countries East to West | 0 | - | 4.92 | 129,118 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,320 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,607 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,901 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,932 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,950 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,327 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,032 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,663 |
| Countries with Double Letters | 0 | - | 4.96 | 93,919 |
| Countries that End in N | 0 | - | 4.94 | 160,959 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,346 |
| Countries with Six Letters | 0 | - | 4.93 | 210,940 |
| Countries with W | 0 | - | 4.97 | 158,622 |
| Countries with Z | 0 | - | 4.98 | 288,536 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,915 |
| Countries That End in U | 0 | - | 4.95 | 119,769 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,067 |
| Countries that End in O | 0 | - | 4.92 | 158,763 |
| Countries that End in R | 0 | - | 4.87 | 118,453 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,988 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,633 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,680 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,762 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,328 |
| Countries That End in Y | 0 | - | 4.90 | 185,358 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,770 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,027 |
| Countries that End in I | 0 | - | 4.94 | 134,625 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,639 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,379 |
| Countries That End in NIA | 0 | - | 4.92 | 109,258 |
| Countries That End in BIA | 0 | - | 4.93 | 148,493 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,372 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,729 |
| Countries That End in RIA | 0 | - | 4.93 | 126,295 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,282 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,990 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,807 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,159 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,728 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,106 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,386 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,904 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,794 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,966 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,468 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,139 |
| Countries that End in L | 0 | - | 4.94 | 156,238 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,720 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,046 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,697 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,536 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,598 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,244 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,768 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,238 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,784 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,201 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,018 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,858 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,281 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,502 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,489 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,429 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,723 |
| One Border Countries | 0 | - | 4.98 | 466,246 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,812,090 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,602,497 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,250 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,834 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,287 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,058 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,062 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,606 |
| Countries by National Anthem | 0 | - | 4.92 | 71,104 |
| NATO Countries | 0 | - | 4.98 | 277,871 |
| EU Countries Quiz | 0 | - | 4.99 | 271,433 |
| Recently Independent Countries | 0 | - | 4.98 | 158,336 |
| French-Speaking Countries | 0 | - | 4.85 | 269,677 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,479 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,829 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,201 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,170 |
| German-Speaking Countries | 0 | - | 4.91 | 142,581 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,993 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,613 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,251 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,903 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,057 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,051 |
