| Axis Occupied Countries of WWII | 0 | - | 4.99 | 228,217 |
| Countries in World War I | 0 | - | 4.88 | 227,380 |
| Battle to Country | 0 | - | 4.91 | 52,887 |
| Important Cities in WWII | 0 | - | 4.42 | 93,176 |
| Independence from Whom | 0 | - | 4.99 | 210,753 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,290 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,204 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,548 |
| Countries by Founding Story | 0 | - | 4.95 | 76,852 |
| Communist Countries in History | 0 | - | 4.63 | 493,828 |
| Recently Independent Countries | 0 | - | 4.98 | 158,354 |
| Countries of the World in 1900 | 0 | - | 4.89 | 84,109 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 194,067 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,776 |
| Countries by Former Name | 0 | - | 4.99 | 124,647 |
| Historical City to Country | 0 | - | 4.84 | 78,310 |
| Cities Bombed During WWII | 0 | - | 4.08 | 30,034 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,148,811 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,828 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,585 |
| WWII First Names | 0 | - | 4.44 | 41,674 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,761 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,647 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,518 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,875 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.92 | 66,752 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 73,007 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,519 |
| Countries Settled by Vikings | 0 | - | 4.93 | 121,083 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,241 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,361 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,468 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,261 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 99,158 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,889 |
| Landlocked Countries | 0 | - | 4.99 | 416,481 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,609 |
| Orthodox Countries | 0 | - | 4.92 | 130,892 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,445 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,401 |
| Monarchies of Europe | 0 | - | 4.90 | 97,677 |
| Monarchies of Asia | 0 | - | 4.97 | 70,817 |
| Asian Country Superlatives | 0 | - | 4.83 | 80,612 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,739,291 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,065 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,745 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,400 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 198,035 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,748 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 119,240 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,440 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,609 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,459 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,676 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,666 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,759 |
| Countries by Independence Day | 0 | - | 4.61 | 52,671 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,638 |
| Island Countries | 0 | - | 4.99 | 708,746 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,848 |
| Himalayan Countries | 0 | - | 4.95 | 136,427 |
| Andean Countries | 0 | - | 4.95 | 83,444 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,713 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,942 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,392 |
| Former Countries by Capital | 0 | - | 4.45 | 127,234 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,993 |
| Danube Countries | 0 | - | 4.97 | 71,377 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,187 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,838 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,119 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,077 |
| European Landlocked Countries | 0 | - | 4.99 | 146,112 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,731 |
| Countries with the Most Species | 0 | - | 4.99 | 101,169 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,868 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,318 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,500 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,137 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,795 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,169 |
| Countries in the Alps | 0 | - | 4.86 | 117,306 |
| Former Countries | 0 | - | 4.75 | 132,956 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,879 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,848 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,241 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,724 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,799 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,236 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,962 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,983 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,789 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,318 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,350 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,196 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,706 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,983 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,992 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,671 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,879 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,416 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,213 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,902 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,520 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,812 |
| Largest Countries By Category | 0 | - | 4.97 | 157,227 |
| Countries by Countries | 0 | - | 4.96 | 62,578 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,369,980 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,434 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,856 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,075 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,406 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,068 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,043,123 |
| Northernmost Countries | 0 | - | 4.99 | 359,279 |
| Political Movements by Country | 0 | - | 4.46 | 72,382 |
| Countries of South America | 0 | - | 5.00 | 919,406 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,314 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,857,986 |
| "Land" Countries | 0 | - | 4.98 | 334,532 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.93 | 81,761 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,501 |
| Top 10 Richest Countries in Europe | 0 | - | 4.90 | 148,750 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,953 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,398 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,743 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,646 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,771 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,225 |
| Countries with Megacities | 0 | - | 4.99 | 248,837 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,076 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,519 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,443 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,471 |
| Countries by Official Language | 0 | - | 4.95 | 193,963 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,469 |
| Countries in their Native Language | 0 | - | 4.99 | 197,589 |
| Subdivisions by Country | 0 | - | 4.86 | 50,189 |
| Megadiverse Countries | 0 | - | 4.96 | 134,523 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,789 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,072 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,619 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,944 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,421 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,532 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,362 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,803 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,133 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,576 |
| Hindu Countries | 0 | - | 4.86 | 49,808 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,678 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,634 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,844 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,193 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,483 |
| World Map Quiz | 0 | - | 4.81 | 64,055 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,268 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,673 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,150 |
| Countries by Road Signs | 0 | - | 4.98 | 53,392 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,029 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,647 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,376 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,653 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,249 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,441 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,607 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,137 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,627 |
| Widest Countries East to West | 0 | - | 4.92 | 129,124 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,324 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,623 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,904 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,940 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,960 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,338 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,071 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,667 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 53,228 |
| Countries with Double Letters | 0 | - | 4.96 | 94,044 |
| Countries that End in N | 0 | - | 4.95 | 164,392 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,475 |
| Countries with Six Letters | 0 | - | 4.93 | 211,046 |
| Countries with W | 0 | - | 4.97 | 158,744 |
| Countries with Z | 0 | - | 4.98 | 288,655 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,979 |
| Countries That End in U | 0 | - | 4.95 | 119,865 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,109 |
| Countries that End in O | 0 | - | 4.92 | 158,821 |
| Countries that End in R | 0 | - | 4.87 | 118,481 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,040 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,681 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,706 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,787 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,349 |
| Countries That End in Y | 0 | - | 4.90 | 185,394 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,795 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,054 |
| Countries that End in I | 0 | - | 4.94 | 134,644 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,663 |
