| Countries of Europe Quiz | 0 | - | 5.00 | 3,753,403 |
| Countries of South America | 0 | - | 5.00 | 922,183 |
| Countries of Oceania | 0 | - | 5.00 | 1,050,077 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,864,770 |
| Landlocked Countries | 0 | - | 4.99 | 418,328 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,295,652 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,676 |
| Himalayan Countries | 0 | - | 4.94 | 137,152 |
| Andean Countries | 0 | - | 4.95 | 83,788 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,037 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,422 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,718 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,262 |
| 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 | 148,597 |
| European Landlocked Countries | 0 | - | 4.99 | 146,701 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,036 |
| Countries with the Most Species | 0 | - | 4.99 | 102,833 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,174 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,404 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,560 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,264 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,938 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,315 |
| Countries in the Alps | 0 | - | 4.87 | 117,597 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,076 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,266 |
| 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 | 95,403 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,208 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,137 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,933 |
| 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 | 41,305 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,879 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,151 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,168 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,058 |
| 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 | 242,066 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,086 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,951 |
| Largest Countries By Category | 0 | - | 4.97 | 157,544 |
| Countries by Countries | 0 | - | 4.96 | 62,785 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,130 |
| 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 | 328,451 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,446 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,809 |
| Island Countries | 0 | - | 4.99 | 709,521 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,045,455 |
| Northernmost Countries | 0 | - | 4.99 | 360,214 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,019,991 |
| "Land" Countries | 0 | - | 4.98 | 335,667 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,374,488 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,816 |
| Countries with Megacities | 0 | - | 4.99 | 252,821 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,674 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,875 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,971 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,861 |
| Countries by Official Language | 0 | - | 4.95 | 194,539 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,385 |
| Countries in their Native Language | 0 | - | 4.99 | 198,091 |
| Independence from Whom | 0 | - | 4.99 | 211,202 |
| Subdivisions by Country | 0 | - | 4.86 | 50,265 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,612 |
| Megadiverse Countries | 0 | - | 4.96 | 134,732 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,273 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,154 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,722 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,000 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,653 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,339 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,889 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,795 |
| 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 | 76,832 |
| 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 | 110,044 |
| World Map Quiz | 0 | - | 4.81 | 64,423 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,306 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,971 |
| Countries by Founding Story | 0 | - | 4.95 | 77,020 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,395 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,873 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,583 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,191 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,464 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,638 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,783 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,233 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,236 |
| 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 | 185,897 |
| 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 | 94,475 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,160 |
| 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 | 34,715 |
| Countries with Double Letters | 0 | - | 4.97 | 95,001 |
| Countries that End in N | 0 | - | 4.95 | 169,770 |
| Countries with Five Letters | 0 | - | 4.96 | 279,458 |
| Countries with Six Letters | 0 | - | 4.94 | 212,363 |
| Countries with W | 0 | - | 4.97 | 159,450 |
| Countries with Z | 0 | - | 4.98 | 289,691 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,656 |
| 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 | 208,222 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,053 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,048 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,633 |
| Countries That End in Y | 0 | - | 4.90 | 185,624 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,156 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,353 |
| Countries that End in I | 0 | - | 4.94 | 134,836 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,008 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,550 |
| Countries That End in NIA | 0 | - | 4.92 | 109,482 |
| Countries That End in BIA | 0 | - | 4.93 | 148,797 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,654 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,008 |
| Countries That End in RIA | 0 | - | 4.93 | 126,496 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,586 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,547 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,146 |
| 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 | 74,285 |
| 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 | 49,172 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,768 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,477 |
| Countries that End in L | 0 | - | 4.94 | 156,504 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,804 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,145 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,809 |
| 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 | 163,038 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,528 |
| 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 | 1,442,513 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,523 |
| One Border Countries | 0 | - | 4.98 | 467,386 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,820,589 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,612,531 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,482 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,283 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,612 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,227 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,302 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,862 |
| Countries by National Anthem | 0 | - | 4.93 | 71,168 |
| NATO Countries | 0 | - | 4.98 | 279,051 |
| EU Countries Quiz | 0 | - | 4.99 | 272,645 |
| Recently Independent Countries | 0 | - | 4.98 | 158,948 |
| French-Speaking Countries | 0 | - | 4.85 | 270,119 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,740 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,423 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,258 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,636 |
| German-Speaking Countries | 0 | - | 4.91 | 145,224 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,197 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,777 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,955 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,596 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,666 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,302 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,532 |
| Olympic Host Countries | 0 | - | 4.98 | 200,233 |
