| Countries of Europe Quiz | 0 | - | 5.00 | 3,808,688 |
| Countries of South America | 0 | - | 5.00 | 933,560 |
| Countries of Oceania | 0 | - | 5.00 | 1,064,559 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,891,297 |
| Landlocked Countries | 0 | - | 4.99 | 426,718 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,929,397 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,644 |
| Himalayan Countries | 0 | - | 4.93 | 140,575 |
| Andean Countries | 0 | - | 4.94 | 85,667 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,803 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 127,292 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,353 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,582 |
| Danube Countries | 0 | - | 4.97 | 72,494 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,713 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,914 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,315 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,763 |
| European Landlocked Countries | 0 | - | 4.99 | 147,685 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,426 |
| Countries with the Most Species | 0 | - | 4.99 | 103,610 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,544 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,795 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,924 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,888 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,631 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,084 |
| Countries in the Alps | 0 | - | 4.87 | 118,882 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,841 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 108,022 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 79,023 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,113 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 117,056 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,338 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,486 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,935 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,480 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,261 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,926 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,798 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,624 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,863 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,963 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 120,032 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,673 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 75,828 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,768 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 246,013 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,339 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,572 |
| Largest Countries By Category | 0 | - | 4.97 | 158,975 |
| Countries by Countries | 0 | - | 4.97 | 63,730 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,355 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,430 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,690 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,174 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 336,099 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,893 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 410,060 |
| Island Countries | 0 | - | 4.99 | 712,800 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,055,519 |
| Northernmost Countries | 0 | - | 4.99 | 364,339 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,032,450 |
| "Land" Countries | 0 | - | 4.98 | 338,659 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,395,564 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,362 |
| Countries with Megacities | 0 | - | 4.99 | 267,530 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 201,019 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,250 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,346 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,352 |
| Countries by Official Language | 0 | - | 4.95 | 196,135 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,805 |
| Countries in their Native Language | 0 | - | 4.99 | 199,857 |
| Independence from Whom | 0 | - | 4.99 | 213,259 |
| Subdivisions by Country | 0 | - | 4.87 | 50,644 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,574 |
| Megadiverse Countries | 0 | - | 4.96 | 146,491 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 133,052 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,559 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,760 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,241 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,371 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,895 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,201 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,600 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,130 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,277 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,668 |
| Landmarks of Countries #1 | 0 | - | 4.89 | 108,445 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,473 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,189 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,610 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,927 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,561 |
| World Map Quiz | 0 | - | 4.81 | 65,860 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,602 |
| Smallest Countries with at Least One Border | 0 | - | 4.88 | 107,768 |
| Countries by Founding Story | 0 | - | 4.95 | 77,869 |
| Countries by Road Signs | 0 | - | 4.98 | 54,401 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,402 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,166 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,635 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,758 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,496 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,615 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,803 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,737 |
| Tallest Countries North to South | 0 | - | 4.85 | 130,868 |
| Widest Countries East to West | 0 | - | 4.92 | 130,787 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,620 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,324 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,541 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,110 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 149,059 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,551 |
| Countries by Contribution to UN Budget | 0 | - | 4.88 | 77,520 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,911 |
| Countries with Double Letters | 0 | - | 4.96 | 97,336 |
| Countries that End in N | 0 | - | 4.95 | 172,412 |
| Countries with Five Letters | 0 | - | 4.96 | 284,318 |
| Countries with Six Letters | 0 | - | 4.94 | 214,720 |
| Countries with W | 0 | - | 4.96 | 161,126 |
| Countries with Z | 0 | - | 4.98 | 292,716 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,474 |
| Countries That End in U | 0 | - | 4.95 | 121,290 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,258 |
| Countries that End in O | 0 | - | 4.92 | 160,296 |
| Countries that End in R | 0 | - | 4.87 | 119,236 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 156,002 |
| Countries Ending in "IA" | 0 | - | 4.99 | 210,001 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 177,752 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,971 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 143,157 |
| Countries That End in Y | 0 | - | 4.91 | 186,131 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,794 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,346 |
| Countries that End in I | 0 | - | 4.94 | 135,372 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,891 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,105 |
| Countries That End in NIA | 0 | - | 4.92 | 110,110 |
| Countries That End in BIA | 0 | - | 4.93 | 149,667 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,850 |
| Countries Whose Names Start with Saint | 0 | - | 4.88 | 119,838 |
| Countries That End in RIA | 0 | - | 4.93 | 127,104 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 111,469 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,794 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,290 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,746 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,298 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,858 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,386 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,567 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,982 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,685 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,820 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,516 |
| Countries that End in L | 0 | - | 4.94 | 157,192 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,307 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,367 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,682 |
| City to Country Quiz #3 | 0 | - | 4.88 | 120,080 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,507 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,563 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,233 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,483 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,352 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 226,099 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,280 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,273 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,961 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,857 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,312 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,455,173 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,760 |
| One Border Countries | 0 | - | 4.98 | 472,297 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,729 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,851,120 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,656,828 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,413 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,387 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,747 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,954 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.91 | 94,305 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,682 |
| Countries by National Anthem | 0 | - | 4.92 | 71,424 |
| NATO Countries | 0 | - | 4.98 | 283,738 |
| EU Countries Quiz | 0 | - | 4.99 | 278,438 |
| Recently Independent Countries | 0 | - | 4.98 | 160,433 |
| French-Speaking Countries | 0 | - | 4.85 | 271,789 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,194 |
| Countries That Use the Euro | 0 | - | 4.95 | 107,030 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,662 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 277,384 |
| German-Speaking Countries | 0 | - | 4.92 | 146,060 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,661 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,788 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 168,496 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,611 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,673 |
