| Countries of Europe Quiz | 0 | - | 5.00 | 3,732,007 |
| Countries of South America | 0 | - | 5.00 | 918,065 |
| Countries of Oceania | 0 | - | 5.00 | 1,044,497 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,854,823 |
| Landlocked Countries | 0 | - | 4.99 | 415,509 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,068,902 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,357 |
| Himalayan Countries | 0 | - | 4.95 | 136,020 |
| Andean Countries | 0 | - | 4.94 | 83,189 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,514 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,662 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,201 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,849 |
| Danube Countries | 0 | - | 4.97 | 71,277 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,015 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,719 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,893 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,837 |
| European Landlocked Countries | 0 | - | 4.99 | 145,980 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,552 |
| Countries with the Most Species | 0 | - | 4.99 | 95,354 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,675 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,272 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,446 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,074 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,723 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,090 |
| Countries in the Alps | 0 | - | 4.86 | 117,144 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,769 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,621 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,166 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,602 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,400 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,152 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,819 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,907 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,704 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,215 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,279 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,147 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,628 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,891 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,906 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,490 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,803 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,351 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,052 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,339 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,237 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,738 |
| Largest Countries By Category | 0 | - | 4.97 | 157,053 |
| Countries by Countries | 0 | - | 4.96 | 62,457 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,693 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,031 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,384 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,959 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,938 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,856 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,861 |
| Island Countries | 0 | - | 4.99 | 708,380 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,900 |
| Northernmost Countries | 0 | - | 4.99 | 358,774 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,015,398 |
| "Land" Countries | 0 | - | 4.98 | 334,129 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,367,491 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,940 |
| Countries with Megacities | 0 | - | 4.99 | 248,283 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,842 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,379 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,227 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,310 |
| Countries by Official Language | 0 | - | 4.95 | 193,215 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,769 |
| Countries in their Native Language | 0 | - | 4.99 | 197,046 |
| Independence from Whom | 0 | - | 4.99 | 210,190 |
| Subdivisions by Country | 0 | - | 4.86 | 50,153 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,088 |
| Megadiverse Countries | 0 | - | 4.96 | 134,470 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,218 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,024 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,552 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,911 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,896 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,138 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,358 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,461 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,308 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,788 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,959 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,527 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,632 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,594 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,802 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,128 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,178 |
| World Map Quiz | 0 | - | 4.81 | 63,827 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,746 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,604 |
| Countries by Founding Story | 0 | - | 4.95 | 76,735 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,807 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,538 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,264 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,375 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,129 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,325 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,519 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,089 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,541 |
| Widest Countries East to West | 0 | - | 4.92 | 129,042 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,288 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,510 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,660 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,874 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,851 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,243 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,772 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,646 |
| Countries with Double Letters | 0 | - | 4.96 | 93,720 |
| Countries that End in N | 0 | - | 4.94 | 157,164 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,068 |
| Countries with Six Letters | 0 | - | 4.93 | 210,740 |
| Countries with W | 0 | - | 4.97 | 158,438 |
| Countries with Z | 0 | - | 4.98 | 288,281 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,786 |
| Countries That End in U | 0 | - | 4.95 | 119,625 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,905 |
| Countries that End in O | 0 | - | 4.92 | 158,669 |
| Countries that End in R | 0 | - | 4.87 | 118,385 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,940 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,449 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,579 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,672 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,221 |
| Countries That End in Y | 0 | - | 4.90 | 185,299 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,643 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,927 |
| Countries that End in I | 0 | - | 4.94 | 134,554 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,507 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,316 |
| Countries That End in NIA | 0 | - | 4.92 | 109,137 |
| Countries That End in BIA | 0 | - | 4.92 | 147,871 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,280 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,653 |
| Countries That End in RIA | 0 | - | 4.93 | 126,211 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,199 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,778 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,703 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,053 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,613 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,042 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,300 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,817 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,707 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,909 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,371 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,018 |
| Countries that End in L | 0 | - | 4.94 | 156,173 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,245 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,024 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,637 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,475 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,539 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,032 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,661 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,851 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,678 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,072 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,946 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,831 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,247 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,470 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,437 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,438,168 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,431 |
| One Border Countries | 0 | - | 4.98 | 465,815 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,808,789 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,597,829 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,171 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,615 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,172 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,644 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,969 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,538 |
| Countries by National Anthem | 0 | - | 4.93 | 71,080 |
| NATO Countries | 0 | - | 4.98 | 277,361 |
| EU Countries Quiz | 0 | - | 4.99 | 270,994 |
| Recently Independent Countries | 0 | - | 4.98 | 158,228 |
| French-Speaking Countries | 0 | - | 4.85 | 269,332 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,458 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,592 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,832 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,593 |
| German-Speaking Countries | 0 | - | 4.89 | 123,632 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,911 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,556 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,900 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,655 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 116,770 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,960 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,183 |
