| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,719 |
| Countries with Glaciers | 0 | - | 4.97 | 105,428 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,661 |
| Least-Forested Countries | 0 | - | 4.53 | 65,210 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,089 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,468,470 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,653 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.62 | 37,821 |
| Landlocked Countries | 0 | - | 4.99 | 420,644 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,671 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,768,297 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,776 |
| Himalayan Countries | 0 | - | 4.95 | 138,137 |
| Andean Countries | 0 | - | 4.95 | 84,288 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,508 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,371 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,139 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,588 |
| Danube Countries | 0 | - | 4.97 | 71,845 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,810 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,251 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,999 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,449 |
| European Landlocked Countries | 0 | - | 4.99 | 146,980 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,393 |
| Countries with the Most Species | 0 | - | 4.99 | 103,102 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,548 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,510 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,664 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,451 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,123 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,514 |
| Countries in the Alps | 0 | - | 4.87 | 117,969 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 99,653 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,739 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,550 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,461 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,321 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,838 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,480 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,346 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,083 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,710 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,571 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,423 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,078 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,357 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,370 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,559 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,185 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,696 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,833 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,230 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,697 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,115 |
| Largest Countries By Category | 0 | - | 4.97 | 157,945 |
| Countries by Countries | 0 | - | 4.97 | 63,023 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,477 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,221 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,516 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,515 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,387 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,078 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,309 |
| Island Countries | 0 | - | 4.99 | 710,457 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,016 |
| Northernmost Countries | 0 | - | 4.99 | 361,278 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,629 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,543 |
| Countries of South America | 0 | - | 5.00 | 925,227 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,237 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,872,269 |
| "Land" Countries | 0 | - | 4.98 | 336,576 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,149 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,024 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,492 |
| Countries with Megacities | 0 | - | 4.99 | 263,506 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,341 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,267 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,628 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,302 |
| Countries by Official Language | 0 | - | 4.95 | 194,956 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,979 |
| Countries in their Native Language | 0 | - | 4.99 | 198,473 |
| Independence from Whom | 0 | - | 4.99 | 211,739 |
| Subdivisions by Country | 0 | - | 4.86 | 50,367 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,008 |
| Megadiverse Countries | 0 | - | 4.96 | 134,898 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,818 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,266 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,850 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,061 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,926 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,489 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,235 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,943 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,568 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,045 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,362 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,798 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,099 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,874 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,257 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,421 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,723 |
| World Map Quiz | 0 | - | 4.81 | 64,887 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,458 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,203 |
| Countries by Founding Story | 0 | - | 4.95 | 77,232 |
| Countries by Road Signs | 0 | - | 4.98 | 53,844 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,805 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,106 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,840 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,804 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,740 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,870 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,180 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,360 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,449 |
| Widest Countries East to West | 0 | - | 4.92 | 129,516 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,418 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,185 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,067 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,645 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,422 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,712 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,314 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,767 |
| Countries with Double Letters | 0 | - | 4.97 | 95,516 |
| Countries that End in N | 0 | - | 4.95 | 170,546 |
| Countries with Five Letters | 0 | - | 4.96 | 281,538 |
| Countries with Six Letters | 0 | - | 4.94 | 212,943 |
| Countries with W | 0 | - | 4.97 | 159,857 |
| Countries with Z | 0 | - | 4.98 | 290,780 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,123 |
| Countries That End in U | 0 | - | 4.95 | 120,574 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,078 |
| Countries that End in O | 0 | - | 4.92 | 159,321 |
| Countries that End in R | 0 | - | 4.87 | 118,824 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,602 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,680 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,365 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,259 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,873 |
| Countries That End in Y | 0 | - | 4.91 | 185,751 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,570 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,648 |
| Countries that End in I | 0 | - | 4.94 | 134,977 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,763 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,696 |
| Countries That End in NIA | 0 | - | 4.92 | 109,646 |
| Countries That End in BIA | 0 | - | 4.93 | 149,005 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,899 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,233 |
| Countries That End in RIA | 0 | - | 4.93 | 126,670 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,801 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,166 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,450 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,841 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,376 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,443 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,831 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,371 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,326 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,302 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,044 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,764 |
| Countries that End in L | 0 | - | 4.94 | 156,683 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,885 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,203 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,919 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,839 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,888 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,457 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,420 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,827 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,359 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,861 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,734 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,024 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.80 | 108,682 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,645 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,770 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,445,886 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,383 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,154 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,829,377 |
| One Border Countries | 0 | - | 4.98 | 468,680 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,624,108 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,452 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,300 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,723 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,834 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,917 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,402 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,553 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,091 |
| Majority Muslim Countries | 0 | - | 4.98 | 374,431 |
| Countries by National Anthem | 0 | - | 4.93 | 71,247 |
| NATO Countries | 0 | - | 4.98 | 280,492 |
