| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,637 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,226,949 |
| Landlocked Countries | 0 | - | 4.99 | 417,431 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,746,877 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,289 |
| Himalayan Countries | 0 | - | 4.95 | 136,815 |
| Andean Countries | 0 | - | 4.95 | 83,633 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,885 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,209 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,560 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,154 |
| Danube Countries | 0 | - | 4.97 | 71,506 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,335 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,922 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,339 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,378 |
| European Landlocked Countries | 0 | - | 4.99 | 146,217 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,910 |
| Countries with the Most Species | 0 | - | 4.99 | 102,501 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,034 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,363 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,540 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,212 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,869 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,251 |
| Countries in the Alps | 0 | - | 4.86 | 117,459 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,980 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,079 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,320 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,828 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,925 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,335 |
| Countries with Glaciers | 0 | - | 4.97 | 104,930 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,094 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,057 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,874 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,414 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,412 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,252 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,803 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,071 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,082 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,884 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,955 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,482 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,327 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,507 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,818 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,886 |
| Largest Countries By Category | 0 | - | 4.97 | 157,391 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,120 |
| Countries by Countries | 0 | - | 4.96 | 62,688 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,982 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,114 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,432 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,174 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,466 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,729 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,181 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,330 |
| Island Countries | 0 | - | 4.99 | 709,172 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,396 |
| Northernmost Countries | 0 | - | 4.99 | 359,817 |
| Countries of South America | 0 | - | 5.00 | 920,828 |
| Countries of Oceania | 0 | - | 5.00 | 1,048,556 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,861,575 |
| "Land" Countries | 0 | - | 4.98 | 335,315 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,372,466 |
| Elements Named for Countries | 0 | - | 4.52 | 24,580 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,548 |
| Countries with Megacities | 0 | - | 4.99 | 249,529 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,398 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,708 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,734 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,672 |
| Countries by Official Language | 0 | - | 4.95 | 194,319 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,144 |
| Countries in their Native Language | 0 | - | 4.99 | 197,911 |
| Independence from Whom | 0 | - | 4.99 | 211,017 |
| Subdivisions by Country | 0 | - | 4.86 | 50,235 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,482 |
| Megadiverse Countries | 0 | - | 4.96 | 134,638 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,056 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,122 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,678 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,971 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,537 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,284 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,736 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,655 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,417 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,824 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,525 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,631 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,732 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,692 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,910 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,253 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,791 |
| World Map Quiz | 0 | - | 4.81 | 64,252 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,811 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,823 |
| Countries by Founding Story | 0 | - | 4.95 | 76,951 |
| Countries by Road Signs | 0 | - | 4.98 | 53,505 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,224 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,763 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,492 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,948 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,374 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,545 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,702 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,191 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,175 |
| Widest Countries East to West | 0 | - | 4.92 | 129,243 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,345 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,765 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,951 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,238 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,064 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,434 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,165 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,696 |
| Countries with Double Letters | 0 | - | 4.97 | 94,711 |
| Countries that End in N | 0 | - | 4.95 | 169,002 |
| Countries with Five Letters | 0 | - | 4.96 | 275,287 |
| Countries with Six Letters | 0 | - | 4.94 | 211,995 |
| Countries with W | 0 | - | 4.97 | 159,232 |
| Countries with Z | 0 | - | 4.98 | 289,366 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,435 |
| Countries That End in U | 0 | - | 4.95 | 120,250 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,451 |
| Countries that End in O | 0 | - | 4.92 | 159,066 |
| Countries that End in R | 0 | - | 4.87 | 118,633 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,405 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,026 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,915 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,940 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,524 |
| Countries That End in Y | 0 | - | 4.90 | 185,542 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,014 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,234 |
| Countries that End in I | 0 | - | 4.94 | 134,753 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,836 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,479 |
| Countries That End in NIA | 0 | - | 4.92 | 109,394 |
| Countries That End in BIA | 0 | - | 4.93 | 148,678 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,545 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,899 |
| Countries That End in RIA | 0 | - | 4.93 | 126,418 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,477 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,310 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,002 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,322 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,953 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,226 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,552 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,083 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,959 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,107 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,653 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,342 |
| Countries that End in L | 0 | - | 4.94 | 156,406 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,375 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,122 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,762 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,628 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,683 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,477 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,920 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,459 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,912 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,376 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,114 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,894 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,317 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,550 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,566 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,441,197 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,180 |
| One Border Countries | 0 | - | 4.98 | 466,898 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,816,906 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,608,024 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,402 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,131 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,521 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,376 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,091 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,465 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,157 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,201 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,748 |
| Countries by National Anthem | 0 | - | 4.92 | 71,151 |
| NATO Countries | 0 | - | 4.98 | 278,585 |
| EU Countries Quiz | 0 | - | 4.99 | 272,149 |
| Recently Independent Countries | 0 | - | 4.98 | 158,487 |
| French-Speaking Countries | 0 | - | 4.85 | 269,958 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,679 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,179 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,816 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,980 |
