| Countries of Europe Quiz | 0 | - | 5.00 | 3,804,153 |
| Countries of South America | 0 | - | 5.00 | 932,619 |
| Countries of Oceania | 0 | - | 5.00 | 1,063,266 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,889,088 |
| Countries with the Highest Life Expectancy | 0 | - | 4.89 | 208,566 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,875,506 |
| Landlocked Countries | 0 | - | 4.99 | 425,802 |
| Sahara Desert Countries | 0 | - | 4.98 | 166,234 |
| Himalayan Countries | 0 | - | 4.93 | 140,225 |
| Andean Countries | 0 | - | 4.94 | 85,442 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,593 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,980 |
| Coffee Producing Countries | 0 | - | 4.83 | 68,150 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,425 |
| Danube Countries | 0 | - | 4.97 | 72,383 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,584 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,835 |
| Countries with the Worst Passports | 0 | - | 4.93 | 85,113 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,599 |
| European Landlocked Countries | 0 | - | 4.99 | 147,599 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,296 |
| Countries with the Most Species | 0 | - | 4.99 | 103,559 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,400 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,775 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,885 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,838 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,575 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 58,011 |
| Countries in the Alps | 0 | - | 4.87 | 118,769 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,621 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,853 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,960 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 97,022 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,945 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,247 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,396 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,858 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,418 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,177 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,867 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.91 | 41,743 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,555 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,789 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,886 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,828 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,607 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 70,036 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,663 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,695 |
| World Countries - Blind Typing | 0 | - | 5.00 | 109,137 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,501 |
| Largest Countries By Category | 0 | - | 4.97 | 158,862 |
| Countries by Countries | 0 | - | 4.96 | 63,638 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,257 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,400 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,669 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 89,104 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,031,411 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 335,376 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,679 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 409,670 |
| Island Countries | 0 | - | 4.99 | 712,552 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,054,670 |
| Northernmost Countries | 0 | - | 4.99 | 363,975 |
| "Land" Countries | 0 | - | 4.98 | 338,373 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,393,561 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 175,142 |
| Countries with Megacities | 0 | - | 4.99 | 267,090 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,831 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 114,128 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 139,148 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,234 |
| Countries by Official Language | 0 | - | 4.95 | 195,988 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,619 |
| Countries in their Native Language | 0 | - | 4.99 | 199,732 |
| Independence from Whom | 0 | - | 4.99 | 213,056 |
| Subdivisions by Country | 0 | - | 4.87 | 50,616 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,435 |
| Megadiverse Countries | 0 | - | 4.96 | 135,278 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,939 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,541 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,656 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,228 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 164,002 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,850 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 95,109 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,569 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 96,043 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,258 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 78,524 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,376 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,442 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,143 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,580 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,845 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,352 |
| World Map Quiz | 0 | - | 4.81 | 65,724 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 159,238 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,714 |
| Countries by Founding Story | 0 | - | 4.95 | 77,791 |
| Countries by Road Signs | 0 | - | 4.98 | 54,347 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,244 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 106,079 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,561 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,562 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,430 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,530 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,727 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,688 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,710 |
| Widest Countries East to West | 0 | - | 4.92 | 130,455 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,598 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,255 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,518 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 95,063 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,967 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,485 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,502 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,890 |
| Countries with Double Letters | 0 | - | 4.96 | 97,073 |
| Countries that End in N | 0 | - | 4.95 | 171,931 |
| Countries with Five Letters | 0 | - | 4.96 | 283,763 |
| Countries with Six Letters | 0 | - | 4.94 | 214,467 |
| Countries with W | 0 | - | 4.96 | 160,932 |
| Countries with Z | 0 | - | 4.98 | 292,445 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,284 |
| Countries That End in U | 0 | - | 4.95 | 121,191 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 135,105 |
| Countries that End in O | 0 | - | 4.92 | 160,216 |
| Countries that End in R | 0 | - | 4.87 | 119,183 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,937 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,828 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,152 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,827 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,760 |
| Countries That End in Y | 0 | - | 4.91 | 186,089 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,455 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,273 |
| Countries that End in I | 0 | - | 4.94 | 135,314 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,622 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 96,059 |
| Countries That End in NIA | 0 | - | 4.92 | 110,052 |
| Countries That End in BIA | 0 | - | 4.93 | 149,574 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,540 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,773 |
| Countries That End in RIA | 0 | - | 4.93 | 127,053 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,392 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,590 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,184 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,627 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,175 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,808 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,328 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,537 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,904 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,653 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,725 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,419 |
| Countries that End in L | 0 | - | 4.94 | 157,130 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 218,009 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,344 |
| City to Country Quiz #1 | 0 | - | 4.97 | 157,512 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,995 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,448 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,429 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,138 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,433 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,260 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,971 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,210 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,239 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,830 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,246 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,454,065 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,478 |
| One Border Countries | 0 | - | 4.98 | 471,932 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,848,661 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,652,725 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,697 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,324 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 269,022 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,649 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,897 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,214 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,610 |
| Countries by National Anthem | 0 | - | 4.92 | 71,408 |
| NATO Countries | 0 | - | 4.98 | 283,415 |
| EU Countries Quiz | 0 | - | 4.99 | 277,906 |
| Recently Independent Countries | 0 | - | 4.98 | 160,347 |
| French-Speaking Countries | 0 | - | 4.85 | 271,674 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,042 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,778 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 291,370 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,960 |
| German-Speaking Countries | 0 | - | 4.92 | 146,022 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,332 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,550 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 168,199 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,369 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 120,415 |
