| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,367 |
| Countries in World War I | 0 | - | 4.88 | 226,563 |
| Battle to Country | 0 | - | 4.91 | 52,498 |
| Important Cities in WWII | 0 | - | 4.42 | 92,869 |
| Independence from Whom | 0 | - | 4.99 | 209,622 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,702 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,984 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,876 |
| Countries by Founding Story | 0 | - | 4.95 | 76,504 |
| Communist Countries in History | 0 | - | 4.63 | 492,409 |
| Recently Independent Countries | 0 | - | 4.98 | 157,958 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,453 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,092 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 148,793 |
| Countries by Former Name | 0 | - | 4.99 | 124,254 |
| Historical City to Country | 0 | - | 4.84 | 78,115 |
| Cities Bombed During WWII | 0 | - | 4.08 | 29,898 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,899,956 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,196 |
| The Dictator Files: Adolf Hitler | 0 | - | 4.79 | 77,300 |
| WWII First Names | 0 | - | 4.44 | 41,556 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,171 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,257 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,236 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,576 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,541 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,779 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,182 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,822 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,405 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,265 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,891 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,311 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,688 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,566 |
| Landlocked Countries | 0 | - | 4.99 | 413,371 |
| Countries with the Most Catholics | 0 | - | 4.90 | 107,987 |
| Orthodox Countries | 0 | - | 4.91 | 130,349 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,356 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,002 |
| Monarchies of Europe | 0 | - | 4.90 | 97,290 |
| Monarchies of Asia | 0 | - | 4.97 | 70,587 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,424 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,714,481 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,566 |
| World Leaders of the World Wars | 0 | - | 4.35 | 37,650 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,752 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,204 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,343 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,215 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,059 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,219 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,095 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,482 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,571 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,039 |
| Countries by Independence Day | 0 | - | 4.56 | 52,597 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,705 |
| Island Countries | 0 | - | 4.99 | 707,517 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,478 |
| Himalayan Countries | 0 | - | 4.95 | 135,267 |
| Andean Countries | 0 | - | 4.94 | 82,778 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,190 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,134 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,851 |
| Former Countries by Capital | 0 | - | 4.45 | 127,029 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,560 |
| Danube Countries | 0 | - | 4.97 | 71,060 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,725 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,513 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,415 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,340 |
| European Landlocked Countries | 0 | - | 4.99 | 145,727 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,164 |
| Countries with the Most Species | 0 | - | 4.99 | 95,229 |
| Countries 197 to 205 | 0 | - | 4.87 | 69,304 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,192 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,358 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,946 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,559 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,930 |
| Countries in the Alps | 0 | - | 4.86 | 116,779 |
| Former Countries | 0 | - | 4.75 | 132,673 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,531 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,207 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,990 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,400 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,128 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,975 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,545 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,731 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,158 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,029 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,187 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,027 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,427 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,717 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,730 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,014 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,617 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,241 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,744 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,146 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,561 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,584 |
| Largest Countries By Category | 0 | - | 4.97 | 156,713 |
| Countries by Countries | 0 | - | 4.96 | 62,235 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,361,634 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,253 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,343 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,956 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,321 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,733 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,161 |
| Northernmost Countries | 0 | - | 4.99 | 357,591 |
| Political Movements by Country | 0 | - | 4.46 | 72,254 |
| Countries of South America | 0 | - | 5.00 | 914,292 |
| Countries of Oceania | 0 | - | 5.00 | 1,039,933 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,847,464 |
| "Land" Countries | 0 | - | 4.98 | 333,576 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,082 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,160 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,117 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,650 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,095 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,220 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,434,624 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,514 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,043 |
| Countries with Megacities | 0 | - | 4.99 | 246,613 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,968 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,833 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,405 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,773 |
| Countries by Official Language | 0 | - | 4.95 | 192,719 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,053 |
| Countries in their Native Language | 0 | - | 4.99 | 196,587 |
| Subdivisions by Country | 0 | - | 4.86 | 50,054 |
| Megadiverse Countries | 0 | - | 4.97 | 133,875 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,753 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,906 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,409 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,850 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,624 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,127 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,206 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,734 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,516 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,401 |
| Hindu Countries | 0 | - | 4.85 | 49,545 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,478 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,488 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,650 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,008 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,519 |
| World Map Quiz | 0 | - | 4.81 | 63,469 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,533 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,301 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,514 |
| Countries by Road Signs | 0 | - | 4.98 | 53,079 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,288 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,957 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,913 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,663 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,827 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,034 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,246 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,927 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,317 |
| Widest Countries East to West | 0 | - | 4.92 | 128,585 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,213 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,178 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,555 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,673 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,606 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,019 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,047 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,570 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 52,744 |
| Countries with Double Letters | 0 | - | 4.97 | 93,339 |
| Countries that End in N | 0 | - | 4.94 | 156,472 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,625 |
| Countries with Six Letters | 0 | - | 4.93 | 210,300 |
| Countries with W | 0 | - | 4.97 | 158,192 |
| Countries with Z | 0 | - | 4.98 | 287,810 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,511 |
| Countries That End in U | 0 | - | 4.95 | 119,496 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,492 |
| Countries that End in O | 0 | - | 4.92 | 158,532 |
| Countries that End in R | 0 | - | 4.87 | 118,254 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,849 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,973 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,289 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,464 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,981 |
| Countries That End in Y | 0 | - | 4.90 | 185,187 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,325 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,639 |
| Countries that End in I | 0 | - | 4.94 | 134,390 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,139 |
