| Countries of Europe Quiz | 0 | - | 5.00 | 3,753,356 |
| Countries of South America | 0 | - | 5.00 | 922,178 |
| Countries of Oceania | 0 | - | 5.00 | 1,050,067 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,864,727 |
| Landlocked Countries | 0 | - | 4.99 | 418,314 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,295,083 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,673 |
| Himalayan Countries | 0 | - | 4.94 | 137,149 |
| 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 | 124,420 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,717 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,261 |
| 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 | 85,993 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,536 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,596 |
| European Landlocked Countries | 0 | - | 4.99 | 146,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,035 |
| Countries with the Most Species | 0 | - | 4.99 | 102,829 |
| 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 | 59,264 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,937 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,315 |
| Countries in the Alps | 0 | - | 4.87 | 117,596 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,076 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,265 |
| 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 | 116,028 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,402 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,208 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,136 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,932 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,501 |
| 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 | 79,149 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,168 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,055 |
| 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 | 242,062 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,085 |
| 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 | 62,784 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,129 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,145 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,458 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,269 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,443 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,444 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,805 |
| Island Countries | 0 | - | 4.99 | 709,519 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,045,443 |
| Northernmost Countries | 0 | - | 4.99 | 360,213 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,019,975 |
| "Land" Countries | 0 | - | 4.98 | 335,667 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,374,470 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,812 |
| Countries with Megacities | 0 | - | 4.99 | 252,492 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,668 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,873 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,968 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,860 |
| Countries by Official Language | 0 | - | 4.95 | 194,535 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,381 |
| Countries in their Native Language | 0 | - | 4.99 | 198,090 |
| Independence from Whom | 0 | - | 4.99 | 211,201 |
| Subdivisions by Country | 0 | - | 4.86 | 50,265 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,611 |
| Megadiverse Countries | 0 | - | 4.96 | 134,730 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,262 |
| 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 | 62,337 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,887 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,793 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,460 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,964 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,831 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,676 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,947 |
| 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 | 110,042 |
| World Map Quiz | 0 | - | 4.81 | 64,421 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,299 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,971 |
| Countries by Founding Story | 0 | - | 4.95 | 77,019 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,393 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,872 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,582 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,185 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,462 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,636 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,782 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,232 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,234 |
| 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 | 94,997 |
| Countries that End in N | 0 | - | 4.95 | 169,763 |
| Countries with Five Letters | 0 | - | 4.96 | 279,443 |
| Countries with Six Letters | 0 | - | 4.94 | 212,363 |
| Countries with W | 0 | - | 4.97 | 159,446 |
| Countries with Z | 0 | - | 4.98 | 289,691 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,655 |
| Countries That End in U | 0 | - | 4.95 | 120,373 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,676 |
| Countries that End in O | 0 | - | 4.92 | 159,164 |
| Countries that End in R | 0 | - | 4.87 | 118,705 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,483 |
| 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 | 197,155 |
| 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 | 183,005 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,549 |
| 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 | 119,006 |
| 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 | 125,491 |
| 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 | 52,637 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,189 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,073 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,170 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,767 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,477 |
| Countries that End in L | 0 | - | 4.94 | 156,503 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,800 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,145 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,808 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,685 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,732 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,676 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,074 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,563 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,037 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,527 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,520 |
| 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 | 1,442,500 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,518 |
| One Border Countries | 0 | - | 4.98 | 467,383 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,820,555 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,612,501 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,482 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,278 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,612 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,226 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,301 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,861 |
| Countries by National Anthem | 0 | - | 4.93 | 71,168 |
| NATO Countries | 0 | - | 4.98 | 279,043 |
| EU Countries Quiz | 0 | - | 4.99 | 272,638 |
| Recently Independent Countries | 0 | - | 4.98 | 158,947 |
| French-Speaking Countries | 0 | - | 4.85 | 270,117 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,740 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,416 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,251 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,631 |
| German-Speaking Countries | 0 | - | 4.91 | 145,220 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,196 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,776 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,954 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,594 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,665 |
| 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 | 200,232 |
