| Countries of Europe Quiz | 0 | - | 5.00 | 3,780,523 |
| Countries of South America | 0 | - | 5.00 | 927,699 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,429 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,878,112 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,603,287 |
| Landlocked Countries | 0 | - | 4.99 | 422,234 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,614 |
| Himalayan Countries | 0 | - | 4.95 | 138,864 |
| Andean Countries | 0 | - | 4.93 | 84,686 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,886 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,931 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,517 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,860 |
| Danube Countries | 0 | - | 4.97 | 72,044 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,060 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,456 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,365 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,852 |
| European Landlocked Countries | 0 | - | 4.99 | 147,176 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,694 |
| Countries with the Most Species | 0 | - | 4.99 | 103,267 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,815 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,607 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,733 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,565 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,254 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,693 |
| Countries in the Alps | 0 | - | 4.87 | 118,248 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,272 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,081 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,679 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,626 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,547 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,967 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,703 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,517 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,201 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,878 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,669 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,542 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,248 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,500 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,552 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,968 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,335 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,105 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,128 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,077 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,197 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,255 |
| Largest Countries By Category | 0 | - | 4.97 | 158,259 |
| Countries by Countries | 0 | - | 4.96 | 63,261 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,723 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,299 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,574 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,696 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,025,989 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,772 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,583 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,507 |
| Island Countries | 0 | - | 4.99 | 711,139 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,186 |
| Northernmost Countries | 0 | - | 4.99 | 362,069 |
| "Land" Countries | 0 | - | 4.98 | 337,410 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,384,331 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,966 |
| Countries with Megacities | 0 | - | 4.99 | 264,707 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,798 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,504 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,060 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,579 |
| Countries by Official Language | 0 | - | 4.95 | 195,303 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,451 |
| Countries in their Native Language | 0 | - | 4.99 | 199,092 |
| Independence from Whom | 0 | - | 4.99 | 212,158 |
| Subdivisions by Country | 0 | - | 4.86 | 50,439 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,774 |
| Megadiverse Countries | 0 | - | 4.96 | 135,039 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,140 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,375 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,249 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,118 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,168 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,611 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,509 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,049 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,672 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,155 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,714 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,901 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,221 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,983 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,369 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,508 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,261 |
| World Map Quiz | 0 | - | 4.81 | 65,137 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,418 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,377 |
| Countries by Founding Story | 0 | - | 4.95 | 77,395 |
| Countries by Road Signs | 0 | - | 4.98 | 54,040 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,138 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,309 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,019 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,277 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,919 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,032 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,322 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,456 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,591 |
| Widest Countries East to West | 0 | - | 4.92 | 129,673 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,463 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,408 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,129 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,785 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,620 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,890 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,380 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,802 |
| Countries with Double Letters | 0 | - | 4.96 | 96,282 |
| Countries that End in N | 0 | - | 4.95 | 171,167 |
| Countries with Five Letters | 0 | - | 4.96 | 282,574 |
| Countries with Six Letters | 0 | - | 4.94 | 213,603 |
| Countries with W | 0 | - | 4.97 | 160,356 |
| Countries with Z | 0 | - | 4.98 | 291,512 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,738 |
| Countries That End in U | 0 | - | 4.95 | 120,865 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,495 |
| Countries that End in O | 0 | - | 4.92 | 159,519 |
| Countries that End in R | 0 | - | 4.87 | 118,975 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,738 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,144 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,710 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,486 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,412 |
| Countries That End in Y | 0 | - | 4.91 | 185,884 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,955 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,875 |
| Countries that End in I | 0 | - | 4.94 | 135,107 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,136 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,827 |
| Countries That End in NIA | 0 | - | 4.92 | 109,798 |
| Countries That End in BIA | 0 | - | 4.93 | 149,225 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,136 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,441 |
| Countries That End in RIA | 0 | - | 4.93 | 126,815 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,034 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,670 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,729 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,152 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,705 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,584 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,039 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,449 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,533 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,429 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,310 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,999 |
| Countries that End in L | 0 | - | 4.94 | 156,852 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,867 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,272 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,034 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,963 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,012 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,783 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,682 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,044 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,647 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,476 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,882 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,109 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,712 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,885 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,600 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,061 |
| One Border Countries | 0 | - | 4.98 | 469,993 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,835,717 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,633,556 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,485 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,962 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,246 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,186 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,586 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,761 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,239 |
| Countries by National Anthem | 0 | - | 4.93 | 71,298 |
| NATO Countries | 0 | - | 4.98 | 281,631 |
| EU Countries Quiz | 0 | - | 4.99 | 275,652 |
| Recently Independent Countries | 0 | - | 4.98 | 159,496 |
| French-Speaking Countries | 0 | - | 4.85 | 270,909 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,906 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,610 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,423 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,584 |
| German-Speaking Countries | 0 | - | 4.91 | 145,764 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,982 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,304 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,428 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,274 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,968 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,312 |
