| Countries of Europe Quiz | 0 | - | 5.00 | 3,721,686 |
| Countries of South America | 0 | - | 5.00 | 915,802 |
| Countries of Oceania | 0 | - | 5.00 | 1,041,821 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,850,392 |
| Landlocked Countries | 0 | - | 4.99 | 414,202 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,966,885 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,821 |
| Himalayan Countries | 0 | - | 4.95 | 135,551 |
| Andean Countries | 0 | - | 4.94 | 82,938 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,301 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,341 |
| Coffee Producing Countries | 0 | - | 4.81 | 66,004 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,676 |
| Danube Countries | 0 | - | 4.97 | 71,129 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,835 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,597 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,604 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,515 |
| European Landlocked Countries | 0 | - | 4.99 | 145,829 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,296 |
| Countries with the Most Species | 0 | - | 4.99 | 95,279 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,437 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,216 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,387 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,988 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,617 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,999 |
| Countries in the Alps | 0 | - | 4.86 | 116,919 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,637 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,361 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,059 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,471 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,242 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,053 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,656 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,810 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,505 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,114 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,214 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,075 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,493 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,801 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,791 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,185 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,702 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,287 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,853 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,596 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,869 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,637 |
| Largest Countries By Category | 0 | - | 4.97 | 156,858 |
| Countries by Countries | 0 | - | 4.96 | 62,319 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,500 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,982 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,347 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,826 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,729 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,343 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,150 |
| Island Countries | 0 | - | 4.99 | 707,836 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,040,258 |
| Northernmost Countries | 0 | - | 4.99 | 358,028 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,012,861 |
| "Land" Countries | 0 | - | 4.98 | 333,801 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,363,972 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,574 |
| Countries with Megacities | 0 | - | 4.99 | 247,469 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,416 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,170 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,826 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,086 |
| Countries by Official Language | 0 | - | 4.95 | 192,899 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,304 |
| Countries in their Native Language | 0 | - | 4.99 | 196,752 |
| Independence from Whom | 0 | - | 4.99 | 209,846 |
| Subdivisions by Country | 0 | - | 4.86 | 50,096 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,869 |
| Megadiverse Countries | 0 | - | 4.97 | 133,952 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,925 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,947 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,458 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,872 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,737 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,042 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,156 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,204 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,242 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,757 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,711 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,449 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,537 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,530 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,720 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,051 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,748 |
| World Map Quiz | 0 | - | 4.81 | 63,619 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,018 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,398 |
| Countries by Founding Story | 0 | - | 4.95 | 76,600 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,477 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,237 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,008 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,932 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,925 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,118 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,335 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,979 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,377 |
| Widest Countries East to West | 0 | - | 4.92 | 128,662 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,226 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,302 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,594 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,731 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,684 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,107 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,065 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,600 |
| Countries with Double Letters | 0 | - | 4.96 | 93,487 |
| Countries that End in N | 0 | - | 4.94 | 156,976 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,794 |
| Countries with Six Letters | 0 | - | 4.93 | 210,458 |
| Countries with W | 0 | - | 4.97 | 158,297 |
| Countries with Z | 0 | - | 4.98 | 288,004 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,619 |
| Countries That End in U | 0 | - | 4.95 | 119,549 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,687 |
| Countries that End in O | 0 | - | 4.92 | 158,590 |
| Countries that End in R | 0 | - | 4.87 | 118,304 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,880 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,200 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,414 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,552 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,090 |
| Countries That End in Y | 0 | - | 4.90 | 185,235 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,473 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,768 |
| Countries that End in I | 0 | - | 4.94 | 134,467 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,296 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,236 |
| Countries That End in NIA | 0 | - | 4.92 | 109,053 |
| Countries That End in BIA | 0 | - | 4.92 | 147,764 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,139 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,543 |
| Countries That End in RIA | 0 | - | 4.93 | 126,127 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,068 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,299 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,559 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,939 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,432 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,960 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,179 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,705 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,569 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,839 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,216 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,877 |
| Countries that End in L | 0 | - | 4.94 | 155,794 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,565 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,998 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,555 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,348 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,464 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,529 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,359 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 137,549 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,437 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,738 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,747 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,727 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,185 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,436 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,355 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,436,076 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,899 |
| One Border Countries | 0 | - | 4.98 | 464,822 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,803,622 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,590,874 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,983 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,225 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,001 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,548 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,774 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,386 |
| Countries by National Anthem | 0 | - | 4.93 | 71,045 |
| NATO Countries | 0 | - | 4.98 | 276,238 |
| EU Countries Quiz | 0 | - | 4.99 | 270,271 |
| Recently Independent Countries | 0 | - | 4.98 | 158,064 |
| French-Speaking Countries | 0 | - | 4.85 | 268,975 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,401 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,194 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,217 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,730 |
| German-Speaking Countries | 0 | - | 4.89 | 123,540 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,654 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,342 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,404 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,201 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,300 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,629 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,017 |
