| Countries of Europe Quiz | 0 | - | 5.00 | 3,801,332 |
| Countries of South America | 0 | - | 5.00 | 931,952 |
| Countries of Oceania | 0 | - | 5.00 | 1,062,501 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,887,723 |
| Landlocked Countries | 0 | - | 4.99 | 425,229 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,843,816 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,998 |
| Himalayan Countries | 0 | - | 4.93 | 140,029 |
| Andean Countries | 0 | - | 4.94 | 85,323 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,476 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,841 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,048 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,337 |
| Danube Countries | 0 | - | 4.97 | 72,325 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,506 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,775 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,999 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,510 |
| European Landlocked Countries | 0 | - | 4.99 | 147,549 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,208 |
| Countries with the Most Species | 0 | - | 4.99 | 103,526 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,335 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,753 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,856 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,797 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,531 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,964 |
| Countries in the Alps | 0 | - | 4.87 | 118,698 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,503 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,761 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,925 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,973 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,889 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,197 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,337 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,814 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,382 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,131 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,828 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,703 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,508 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,739 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,836 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,714 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,569 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,718 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,611 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,494 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,028 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,477 |
| Largest Countries By Category | 0 | - | 4.97 | 158,787 |
| Countries by Countries | 0 | - | 4.96 | 63,587 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,197 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,384 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,654 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,057 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,051 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,539 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,431 |
| Island Countries | 0 | - | 4.99 | 712,375 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,217 |
| Northernmost Countries | 0 | - | 4.99 | 363,771 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,030,663 |
| "Land" Countries | 0 | - | 4.98 | 338,289 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,392,544 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,023 |
| Countries with Megacities | 0 | - | 4.99 | 266,865 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,737 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,044 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,053 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,167 |
| Countries by Official Language | 0 | - | 4.95 | 195,911 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,517 |
| Countries in their Native Language | 0 | - | 4.99 | 199,661 |
| Independence from Whom | 0 | - | 4.99 | 212,965 |
| Subdivisions by Country | 0 | - | 4.87 | 50,593 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,364 |
| Megadiverse Countries | 0 | - | 4.96 | 135,252 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,875 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,516 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,472 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,214 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,583 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,816 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,052 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,548 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,839 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,246 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,436 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,352 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,422 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,130 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,560 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,699 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,239 |
| World Map Quiz | 0 | - | 4.81 | 65,618 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,018 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,669 |
| Countries by Founding Story | 0 | - | 4.95 | 77,766 |
| Countries by Road Signs | 0 | - | 4.98 | 54,311 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,164 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,016 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,510 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,450 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,381 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,484 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,683 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,661 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,568 |
| Widest Countries East to West | 0 | - | 4.92 | 130,404 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,585 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,198 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,498 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,026 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,940 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,431 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,485 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,885 |
| Countries with Double Letters | 0 | - | 4.96 | 96,991 |
| Countries that End in N | 0 | - | 4.95 | 171,852 |
| Countries with Five Letters | 0 | - | 4.96 | 283,648 |
| Countries with Six Letters | 0 | - | 4.94 | 214,383 |
| Countries with W | 0 | - | 4.96 | 160,884 |
| Countries with Z | 0 | - | 4.98 | 292,345 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,240 |
| Countries That End in U | 0 | - | 4.95 | 121,160 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,045 |
| Countries that End in O | 0 | - | 4.92 | 160,184 |
| Countries that End in R | 0 | - | 4.87 | 119,156 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,914 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,761 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,107 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,785 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,716 |
| Countries That End in Y | 0 | - | 4.91 | 186,075 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,406 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,234 |
| Countries that End in I | 0 | - | 4.94 | 135,296 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,564 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,032 |
| Countries That End in NIA | 0 | - | 4.92 | 110,026 |
| Countries That End in BIA | 0 | - | 4.93 | 149,548 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,482 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,740 |
| Countries That End in RIA | 0 | - | 4.93 | 127,033 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,354 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,495 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,126 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,562 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,128 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,783 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,300 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,529 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,865 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,637 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,673 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,368 |
| Countries that End in L | 0 | - | 4.94 | 157,090 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,836 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,338 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,410 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,928 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,407 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,352 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,095 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,406 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,211 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,917 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,179 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,222 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,812 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,209 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,453,442 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,320 |
| One Border Countries | 0 | - | 4.98 | 471,746 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,847,120 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,650,625 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,285 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,947 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,612 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,867 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,172 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,565 |
| Countries by National Anthem | 0 | - | 4.93 | 71,399 |
| NATO Countries | 0 | - | 4.98 | 283,208 |
| EU Countries Quiz | 0 | - | 4.99 | 277,619 |
| Recently Independent Countries | 0 | - | 4.98 | 160,273 |
| French-Speaking Countries | 0 | - | 4.85 | 271,595 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,026 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,643 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,166 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,712 |
| German-Speaking Countries | 0 | - | 4.92 | 146,001 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,217 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,500 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 167,959 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,225 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,226 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,768 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 113,031 |
