| Countries of the World Quiz | 0 | - | 5.00 | 46,871,901 |
| Landlocked Countries | 0 | - | 4.99 | 413,088 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,711,614 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,351 |
| Himalayan Countries | 0 | - | 4.95 | 135,136 |
| Andean Countries | 0 | - | 4.94 | 82,715 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,133 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,051 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,804 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,507 |
| Danube Countries | 0 | - | 4.97 | 71,022 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,683 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,479 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,341 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,261 |
| European Landlocked Countries | 0 | - | 4.99 | 145,691 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,096 |
| Countries with the Most Species | 0 | - | 4.99 | 95,209 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,250 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,183 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,342 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,920 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,537 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,893 |
| Countries in the Alps | 0 | - | 4.87 | 116,728 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,501 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,132 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,963 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,354 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,089 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,948 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,501 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,706 |
| Largest Country by Body of Water | 0 | - | 4.96 | 56,753 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 61,999 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,176 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,009 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,393 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,696 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,697 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,935 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,584 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,214 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,713 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 238,959 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,446 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,559 |
| Largest Countries By Category | 0 | - | 4.97 | 156,663 |
| Countries by Countries | 0 | - | 4.96 | 62,195 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,276 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,942 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,310 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,691 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,268 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,917 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,171 |
| Island Countries | 0 | - | 4.99 | 707,356 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,038,690 |
| Northernmost Countries | 0 | - | 4.99 | 357,395 |
| Countries of South America | 0 | - | 5.00 | 913,798 |
| Countries of Oceania | 0 | - | 5.00 | 1,039,155 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,846,134 |
| "Land" Countries | 0 | - | 4.98 | 333,485 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,360,694 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,926 |
| Countries with Megacities | 0 | - | 4.99 | 246,346 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,852 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,764 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,304 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,708 |
| Countries by Official Language | 0 | - | 4.95 | 192,636 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,952 |
| Countries in their Native Language | 0 | - | 4.99 | 196,512 |
| Independence from Whom | 0 | - | 4.99 | 209,540 |
| Subdivisions by Country | 0 | - | 4.86 | 50,040 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,624 |
| Megadiverse Countries | 0 | - | 4.97 | 133,845 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,687 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,890 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,385 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,844 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,574 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,954 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,630 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,085 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,190 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,726 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,441 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,379 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,452 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,465 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,630 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,996 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,408 |
| World Map Quiz | 0 | - | 4.81 | 63,405 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,346 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,246 |
| Countries by Founding Story | 0 | - | 4.95 | 76,468 |
| Countries by Road Signs | 0 | - | 4.98 | 53,029 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,209 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,911 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,878 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,568 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,797 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 92,995 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,199 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,896 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,282 |
| Widest Countries East to West | 0 | - | 4.92 | 128,546 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,197 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,126 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,534 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,639 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,544 |
| Countries with the Most Desert | 0 | - | 4.93 | 126,970 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,037 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,556 |
| Countries with Double Letters | 0 | - | 4.97 | 93,265 |
| Countries that End in N | 0 | - | 4.94 | 156,331 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,541 |
| Countries with Six Letters | 0 | - | 4.93 | 210,241 |
| Countries with W | 0 | - | 4.97 | 158,146 |
| Countries with Z | 0 | - | 4.98 | 287,712 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,455 |
| Countries That End in U | 0 | - | 4.95 | 119,470 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,416 |
| Countries that End in O | 0 | - | 4.92 | 158,498 |
| Countries that End in R | 0 | - | 4.87 | 118,227 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,821 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,905 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,211 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,412 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,621 |
| Countries That End in Y | 0 | - | 4.90 | 185,170 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,218 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,585 |
| Countries that End in I | 0 | - | 4.94 | 134,343 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,061 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,157 |
| Countries That End in NIA | 0 | - | 4.92 | 108,946 |
| Countries That End in BIA | 0 | - | 4.92 | 147,640 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,003 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,427 |
| Countries That End in RIA | 0 | - | 4.93 | 126,032 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,940 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,041 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,467 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,847 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,283 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,885 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,055 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,582 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,426 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,779 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,045 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,726 |
| Countries that End in L | 0 | - | 4.94 | 155,664 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,835 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,973 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,475 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,245 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,383 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 246,472 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 198,991 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,857 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,099 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,288 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,458 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,577 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,155 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,398 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,275 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,433,956 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,359 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,798,578 |
| One Border Countries | 0 | - | 4.98 | 463,778 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,584,848 |
| Countries of the World in Plague Inc. | 0 | - | 4.53 | 29,647 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,751 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,761 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,787 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,421 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,521 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,178 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,143 |
| Countries by National Anthem | 0 | - | 4.92 | 71,001 |
| NATO Countries | 0 | - | 4.98 | 275,304 |
| EU Countries Quiz | 0 | - | 4.99 | 269,592 |
| Recently Independent Countries | 0 | - | 4.98 | 157,902 |
| French-Speaking Countries | 0 | - | 4.85 | 268,654 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,347 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,801 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,630 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 267,862 |
| German-Speaking Countries | 0 | - | 4.89 | 123,485 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,086,808 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,556 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,275 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,548 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,925 |
