| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,771 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,611,815 |
| Landlocked Countries | 0 | - | 4.99 | 422,344 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,781,424 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,704 |
| Himalayan Countries | 0 | - | 4.95 | 138,904 |
| Andean Countries | 0 | - | 4.93 | 84,717 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,921 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,982 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,538 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,877 |
| Danube Countries | 0 | - | 4.97 | 72,063 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,078 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,468 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,381 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,871 |
| European Landlocked Countries | 0 | - | 4.99 | 147,191 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,720 |
| Countries with the Most Species | 0 | - | 4.99 | 103,274 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,837 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,615 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,736 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,574 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,262 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,709 |
| Countries in the Alps | 0 | - | 4.87 | 118,269 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,356 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,103 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,694 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,635 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,557 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,983 |
| Countries with Glaciers | 0 | - | 4.96 | 105,571 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,718 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,542 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,202 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,892 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,677 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,548 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,258 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,511 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,571 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,994 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,344 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,237 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,138 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,124 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,237 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,264 |
| Largest Countries By Category | 0 | - | 4.97 | 158,281 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,700 |
| Countries by Countries | 0 | - | 4.96 | 63,274 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,744 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,304 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,577 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,710 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,764 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,853 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,618 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,571 |
| Island Countries | 0 | - | 4.99 | 711,176 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,327 |
| Northernmost Countries | 0 | - | 4.99 | 362,131 |
| Countries of South America | 0 | - | 5.00 | 927,837 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,631 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,878,472 |
| "Land" Countries | 0 | - | 4.98 | 337,442 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,384,570 |
| Elements Named for Countries | 0 | - | 4.53 | 24,819 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,990 |
| Countries with Megacities | 0 | - | 4.99 | 264,788 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,828 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,519 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,084 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,597 |
| Countries by Official Language | 0 | - | 4.95 | 195,319 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,483 |
| Countries in their Native Language | 0 | - | 4.99 | 199,115 |
| Independence from Whom | 0 | - | 4.99 | 212,186 |
| Subdivisions by Country | 0 | - | 4.86 | 50,441 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,797 |
| Megadiverse Countries | 0 | - | 4.96 | 135,048 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,164 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,379 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,254 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,120 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,179 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,615 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,522 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,055 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,680 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,160 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,742 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,911 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,227 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,986 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,374 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,514 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,290 |
| World Map Quiz | 0 | - | 4.81 | 65,144 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,466 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,389 |
| Countries by Founding Story | 0 | - | 4.95 | 77,406 |
| Countries by Road Signs | 0 | - | 4.98 | 54,047 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,161 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,318 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,030 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,304 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,931 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,046 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,326 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,466 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,599 |
| Widest Countries East to West | 0 | - | 4.92 | 129,684 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,464 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,425 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,134 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,793 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,625 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,907 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,387 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,808 |
| Countries with Double Letters | 0 | - | 4.96 | 96,303 |
| Countries that End in N | 0 | - | 4.95 | 171,199 |
| Countries with Five Letters | 0 | - | 4.96 | 282,620 |
| Countries with Six Letters | 0 | - | 4.94 | 213,636 |
| Countries with W | 0 | - | 4.97 | 160,380 |
| Countries with Z | 0 | - | 4.98 | 291,545 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,754 |
| Countries That End in U | 0 | - | 4.95 | 120,877 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,513 |
| Countries that End in O | 0 | - | 4.92 | 159,533 |
| Countries that End in R | 0 | - | 4.87 | 118,981 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,750 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,162 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,730 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,499 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,419 |
| Countries That End in Y | 0 | - | 4.91 | 185,891 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,968 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,891 |
| Countries that End in I | 0 | - | 4.94 | 135,116 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,148 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,838 |
| Countries That End in NIA | 0 | - | 4.92 | 109,805 |
| Countries That End in BIA | 0 | - | 4.93 | 149,236 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,145 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,449 |
| Countries That End in RIA | 0 | - | 4.93 | 126,824 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,040 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,701 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,745 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,169 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,728 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,590 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,053 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,456 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,550 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,442 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,322 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,013 |
| Countries that End in L | 0 | - | 4.94 | 156,864 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,913 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,276 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,046 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,976 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,019 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,810 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,691 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,137 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,829 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,504 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,893 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,117 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,714 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,891 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,764 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,108 |
| One Border Countries | 0 | - | 4.98 | 470,066 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,836,122 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,634,433 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,482 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,389 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,751 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,490 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,975 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,278 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,203 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,597 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,776 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,248 |
| Countries by National Anthem | 0 | - | 4.93 | 71,302 |
| NATO Countries | 0 | - | 4.98 | 281,686 |
| EU Countries Quiz | 0 | - | 4.99 | 275,714 |
| Recently Independent Countries | 0 | - | 4.98 | 159,510 |
| French-Speaking Countries | 0 | - | 4.85 | 270,940 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,909 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,642 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,479 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,657 |
