| Countries of Europe Quiz | 0 | - | 5.00 | 3,738,360 |
| Countries of South America | 0 | - | 5.00 | 919,254 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,118 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,857,641 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,138,668 |
| Landlocked Countries | 0 | - | 4.99 | 416,345 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,782 |
| Himalayan Countries | 0 | - | 4.95 | 136,376 |
| Andean Countries | 0 | - | 4.95 | 83,412 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,677 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,903 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,368 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,968 |
| Danube Countries | 0 | - | 4.97 | 71,366 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,158 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,821 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,092 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,044 |
| European Landlocked Countries | 0 | - | 4.99 | 146,097 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,708 |
| Countries with the Most Species | 0 | - | 4.99 | 100,496 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,853 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,315 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,490 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,133 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,789 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,160 |
| Countries in the Alps | 0 | - | 4.86 | 117,292 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,873 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,818 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,233 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,711 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,775 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,223 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,950 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,972 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,774 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,309 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,340 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,190 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,698 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,969 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,979 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,649 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,869 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,405 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,200 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,820 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,488 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,794 |
| Largest Countries By Category | 0 | - | 4.97 | 157,213 |
| Countries by Countries | 0 | - | 4.96 | 62,565 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,835 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,069 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,404 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,056 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,016,756 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,575 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,690 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,543 |
| Island Countries | 0 | - | 4.99 | 708,711 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,042,952 |
| Northernmost Countries | 0 | - | 4.99 | 359,211 |
| "Land" Countries | 0 | - | 4.98 | 334,428 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,369,679 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,185 |
| Countries with Megacities | 0 | - | 4.99 | 248,761 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,044 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,500 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,416 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,444 |
| Countries by Official Language | 0 | - | 4.95 | 193,916 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,407 |
| Countries in their Native Language | 0 | - | 4.99 | 197,550 |
| Independence from Whom | 0 | - | 4.99 | 210,547 |
| Subdivisions by Country | 0 | - | 4.86 | 50,183 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,270 |
| Megadiverse Countries | 0 | - | 4.96 | 134,517 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,749 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,066 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,615 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,941 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,411 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,193 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,522 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,522 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,354 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,801 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,120 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,569 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,668 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,631 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,836 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,184 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,443 |
| World Map Quiz | 0 | - | 4.81 | 64,011 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,193 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,667 |
| Countries by Founding Story | 0 | - | 4.95 | 76,839 |
| Countries by Road Signs | 0 | - | 4.98 | 53,377 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,005 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,630 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,363 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,613 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,228 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,427 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,598 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,131 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,617 |
| Widest Countries East to West | 0 | - | 4.92 | 129,119 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,320 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,611 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,901 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,932 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,952 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,328 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,033 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,663 |
| Countries with Double Letters | 0 | - | 4.96 | 93,934 |
| Countries that End in N | 0 | - | 4.94 | 161,422 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,361 |
| Countries with Six Letters | 0 | - | 4.93 | 210,957 |
| Countries with W | 0 | - | 4.97 | 158,634 |
| Countries with Z | 0 | - | 4.98 | 288,556 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,922 |
| Countries That End in U | 0 | - | 4.95 | 119,781 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,070 |
| Countries that End in O | 0 | - | 4.92 | 158,771 |
| Countries that End in R | 0 | - | 4.87 | 118,455 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,989 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,639 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,682 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,764 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,331 |
| Countries That End in Y | 0 | - | 4.90 | 185,362 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,773 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,027 |
| Countries that End in I | 0 | - | 4.94 | 134,627 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,639 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,379 |
| Countries That End in NIA | 0 | - | 4.92 | 109,259 |
| Countries That End in BIA | 0 | - | 4.93 | 148,496 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,375 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,729 |
| Countries That End in RIA | 0 | - | 4.93 | 126,297 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,286 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,993 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,809 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,160 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,729 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,109 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,391 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,907 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,794 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,968 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,469 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,142 |
| Countries that End in L | 0 | - | 4.94 | 156,239 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,728 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,047 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,699 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,538 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,599 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,247 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,769 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,242 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,785 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,202 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,020 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,858 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,282 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,503 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,489 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,451 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,725 |
| One Border Countries | 0 | - | 4.98 | 466,256 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,812,141 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,602,554 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,252 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,835 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,288 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,058 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,063 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,607 |
| Countries by National Anthem | 0 | - | 4.92 | 71,104 |
| NATO Countries | 0 | - | 4.98 | 277,878 |
| EU Countries Quiz | 0 | - | 4.99 | 271,438 |
| Recently Independent Countries | 0 | - | 4.98 | 158,338 |
| French-Speaking Countries | 0 | - | 4.85 | 269,683 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,480 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,831 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,205 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,175 |
| German-Speaking Countries | 0 | - | 4.91 | 142,645 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,993 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,613 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,259 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,908 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,066 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,054 |
