| Countries of Europe Quiz | 0 | - | 5.00 | 3,753,300 |
| Countries of South America | 0 | - | 5.00 | 922,172 |
| Countries of Oceania | 0 | - | 5.00 | 1,050,052 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,864,699 |
| Landlocked Countries | 0 | - | 4.99 | 418,306 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,294,418 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,664 |
| Himalayan Countries | 0 | - | 4.94 | 137,147 |
| Andean Countries | 0 | - | 4.95 | 83,786 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,034 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,416 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,714 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,260 |
| Danube Countries | 0 | - | 4.97 | 71,590 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,461 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,992 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,536 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,595 |
| European Landlocked Countries | 0 | - | 4.99 | 146,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,034 |
| Countries with the Most Species | 0 | - | 4.99 | 102,828 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,171 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,403 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,559 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,263 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,937 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,314 |
| Countries in the Alps | 0 | - | 4.87 | 117,595 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,074 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,261 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,372 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,920 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,027 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,402 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,204 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,135 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,931 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,500 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,447 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,304 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,879 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,148 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,166 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,053 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,020 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,539 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,437 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,060 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,083 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,950 |
| Largest Countries By Category | 0 | - | 4.97 | 157,543 |
| Countries by Countries | 0 | - | 4.96 | 62,783 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,129 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,144 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,458 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,265 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,431 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,441 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,799 |
| Island Countries | 0 | - | 4.99 | 709,514 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,045,425 |
| Northernmost Countries | 0 | - | 4.99 | 360,208 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,019,970 |
| "Land" Countries | 0 | - | 4.98 | 335,665 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,374,451 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,809 |
| Countries with Megacities | 0 | - | 4.99 | 252,109 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,663 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,867 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,963 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,857 |
| Countries by Official Language | 0 | - | 4.95 | 194,534 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,379 |
| Countries in their Native Language | 0 | - | 4.99 | 198,090 |
| Independence from Whom | 0 | - | 4.99 | 211,197 |
| Subdivisions by Country | 0 | - | 4.86 | 50,264 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,611 |
| Megadiverse Countries | 0 | - | 4.96 | 134,728 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,253 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,154 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,721 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,000 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,650 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,336 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,885 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,792 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,458 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,963 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,830 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,676 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,946 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,750 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,106 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,298 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,037 |
| World Map Quiz | 0 | - | 4.81 | 64,420 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,290 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,971 |
| Countries by Founding Story | 0 | - | 4.95 | 77,018 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,392 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,872 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,581 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,183 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,460 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,636 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,779 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,232 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,233 |
| Widest Countries East to West | 0 | - | 4.92 | 129,318 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,372 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,894 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,978 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,474 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,155 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,494 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,218 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,714 |
| Countries with Double Letters | 0 | - | 4.97 | 94,996 |
| Countries that End in N | 0 | - | 4.95 | 169,757 |
| Countries with Five Letters | 0 | - | 4.96 | 279,424 |
| Countries with Six Letters | 0 | - | 4.94 | 212,362 |
| Countries with W | 0 | - | 4.97 | 159,445 |
| Countries with Z | 0 | - | 4.98 | 289,688 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,653 |
| Countries That End in U | 0 | - | 4.95 | 120,373 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,674 |
| Countries that End in O | 0 | - | 4.92 | 159,163 |
| Countries that End in R | 0 | - | 4.87 | 118,705 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,481 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,219 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,049 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,047 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,632 |
| Countries That End in Y | 0 | - | 4.90 | 185,624 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,154 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,352 |
| Countries that End in I | 0 | - | 4.94 | 134,836 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,003 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,548 |
| Countries That End in NIA | 0 | - | 4.92 | 109,482 |
| Countries That End in BIA | 0 | - | 4.93 | 148,796 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,653 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,005 |
| Countries That End in RIA | 0 | - | 4.93 | 126,496 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,585 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,544 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,142 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,488 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,051 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,284 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,636 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,189 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,068 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,170 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,766 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,475 |
| Countries that End in L | 0 | - | 4.94 | 156,502 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,796 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,145 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,806 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,684 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,730 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,674 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,072 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,562 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,037 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,526 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,519 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,930 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,584 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,628 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,442,491 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,515 |
| One Border Countries | 0 | - | 4.98 | 467,373 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,820,509 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,612,458 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,480 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,275 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,611 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,226 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,298 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,859 |
| Countries by National Anthem | 0 | - | 4.93 | 71,168 |
| NATO Countries | 0 | - | 4.98 | 279,040 |
| EU Countries Quiz | 0 | - | 4.99 | 272,638 |
| Recently Independent Countries | 0 | - | 4.98 | 158,946 |
| French-Speaking Countries | 0 | - | 4.85 | 270,114 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,740 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,411 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,246 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,626 |
| German-Speaking Countries | 0 | - | 4.91 | 145,218 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,195 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,776 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,952 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,593 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,655 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,301 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,532 |
| Olympic Host Countries | 0 | - | 4.98 | 200,231 |
