| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,639 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,228,060 |
| Landlocked Countries | 0 | - | 4.99 | 417,441 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,746,976 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,295 |
| Himalayan Countries | 0 | - | 4.95 | 136,815 |
| Andean Countries | 0 | - | 4.95 | 83,634 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,887 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,212 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,560 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,156 |
| Danube Countries | 0 | - | 4.97 | 71,506 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,337 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,923 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,344 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,380 |
| European Landlocked Countries | 0 | - | 4.99 | 146,218 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,911 |
| Countries with the Most Species | 0 | - | 4.99 | 102,513 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,037 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,364 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,541 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,212 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,872 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,253 |
| Countries in the Alps | 0 | - | 4.86 | 117,460 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,980 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,082 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,321 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,829 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,926 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,336 |
| Countries with Glaciers | 0 | - | 4.97 | 104,933 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,095 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,060 |
| 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 | 41,254 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,805 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,073 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,082 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,885 |
| 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 | 45,328 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,514 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,828 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,887 |
| Largest Countries By Category | 0 | - | 4.97 | 157,395 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,155 |
| Countries by Countries | 0 | - | 4.96 | 62,690 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,983 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,114 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,433 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,178 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,467 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 327,741 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,188 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,346 |
| Island Countries | 0 | - | 4.99 | 709,176 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,412 |
| Northernmost Countries | 0 | - | 4.99 | 359,824 |
| Countries of South America | 0 | - | 5.00 | 920,850 |
| Countries of Oceania | 0 | - | 5.00 | 1,048,581 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,861,625 |
| "Land" Countries | 0 | - | 4.98 | 335,321 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,372,496 |
| Elements Named for Countries | 0 | - | 4.52 | 24,581 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,552 |
| Countries with Megacities | 0 | - | 4.99 | 249,533 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,400 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,711 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,736 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,676 |
| Countries by Official Language | 0 | - | 4.95 | 194,329 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,148 |
| Countries in their Native Language | 0 | - | 4.99 | 197,916 |
| Independence from Whom | 0 | - | 4.99 | 211,022 |
| Subdivisions by Country | 0 | - | 4.86 | 50,235 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,486 |
| Megadiverse Countries | 0 | - | 4.96 | 134,645 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,059 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,123 |
| 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 | 162,538 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,285 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,737 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,661 |
| 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 | 76,534 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,632 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,733 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,692 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,912 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,254 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,800 |
| World Map Quiz | 0 | - | 4.81 | 64,254 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,825 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,826 |
| Countries by Founding Story | 0 | - | 4.95 | 76,952 |
| Countries by Road Signs | 0 | - | 4.98 | 53,507 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,224 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,765 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,493 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,952 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,376 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,545 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,704 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,192 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,176 |
| Widest Countries East to West | 0 | - | 4.92 | 129,245 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,345 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,769 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,953 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,253 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,065 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,436 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,166 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,696 |
| Countries with Double Letters | 0 | - | 4.97 | 94,714 |
| Countries that End in N | 0 | - | 4.95 | 169,013 |
| Countries with Five Letters | 0 | - | 4.96 | 275,394 |
| Countries with Six Letters | 0 | - | 4.94 | 212,001 |
| Countries with W | 0 | - | 4.97 | 159,238 |
| Countries with Z | 0 | - | 4.98 | 289,377 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,438 |
| Countries That End in U | 0 | - | 4.95 | 120,250 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,457 |
| Countries that End in O | 0 | - | 4.92 | 159,069 |
| Countries that End in R | 0 | - | 4.87 | 118,635 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,405 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,029 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,919 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,943 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,528 |
| Countries That End in Y | 0 | - | 4.90 | 185,545 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,016 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,237 |
| Countries that End in I | 0 | - | 4.94 | 134,754 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,840 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,480 |
| Countries That End in NIA | 0 | - | 4.92 | 109,394 |
| Countries That End in BIA | 0 | - | 4.93 | 148,679 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,546 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,901 |
| Countries That End in RIA | 0 | - | 4.93 | 126,418 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,483 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,312 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,004 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,326 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,956 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,228 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,556 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,085 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,964 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,108 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,657 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,342 |
| Countries that End in L | 0 | - | 4.94 | 156,409 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,397 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,122 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,763 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,629 |
| 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 | 199,921 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,461 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,914 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,378 |
| 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 | 62,568 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,441,220 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,189 |
| One Border Countries | 0 | - | 4.98 | 466,905 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,816,976 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,608,158 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,403 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,131 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,522 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,379 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,096 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,468 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,159 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,203 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,749 |
| Countries by National Anthem | 0 | - | 4.92 | 71,151 |
| NATO Countries | 0 | - | 4.98 | 278,597 |
| EU Countries Quiz | 0 | - | 4.99 | 272,155 |
| Recently Independent Countries | 0 | - | 4.98 | 158,490 |
| French-Speaking Countries | 0 | - | 4.85 | 269,962 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,680 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,186 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,823 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,993 |
