| Countries in World War I | 0 | - | 4.88 | 226,626 |
| Axis Occupied Countries of WWII | 0 | - | 4.99 | 227,423 |
| Battle to Country | 0 | - | 4.91 | 52,532 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,484 |
| Countries in World War II | 0 | - | 4.54 | 904,637 |
| Independence from Whom | 0 | - | 4.99 | 209,699 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,759 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,001 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,026 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,756 |
| Countries by Founding Story | 0 | - | 4.95 | 76,544 |
| Communist Countries in History | 0 | - | 4.63 | 492,552 |
| Recently Independent Countries | 0 | - | 4.98 | 157,989 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,515 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,184 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 148,881 |
| Countries by Former Name | 0 | - | 4.99 | 124,297 |
| Historical City to Country | 0 | - | 4.84 | 78,132 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,500 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,736 |
| Most Populous Countries by Year | 0 | - | 4.83 | 109,242 |
| First Countries to Reach 5 Million People | 0 | - | 4.92 | 134,305 |
| Most Populous Modern-Day Countries in 1000 AD | 0 | - | 4.87 | 75,284 |
| Most Populous Modern-Day Countries in 1 AD | 0 | - | 4.97 | 83,616 |
| Most Populous Modern-Day Countries in 1800 AD | 0 | - | 4.93 | 66,576 |
| Most Populous Modern-Day Countries in 1500 AD | 0 | - | 4.93 | 72,818 |
| Most Populous Modern-Day Countries by Century | 0 | - | 4.98 | 96,227 |
| Countries of the World Quiz | 0 | - | 5.00 | 46,923,495 |
| Countries Settled by Vikings | 0 | - | 4.93 | 120,846 |
| Countries with the Most Christians | 0 | - | 4.92 | 141,471 |
| Warsaw Pact Countries | 0 | - | 4.83 | 84,275 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 86,934 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,471 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,731 |
| World Map with Random Merged Countries | 0 | - | 4.99 | 1,705,589 |
| Most Populous Countries in 1900 | 0 | - | 4.91 | 172,600 |
| Important Cities in WWII | 0 | - | 4.42 | 92,888 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,384 |
| Countries with the Most Catholics | 0 | - | 4.90 | 108,056 |
| Orthodox Countries | 0 | - | 4.91 | 130,397 |
| Countries that Have Won the Most Battles | 0 | - | 4.02 | 39,367 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 78,046 |
| Monarchies of Europe | 0 | - | 4.90 | 97,332 |
| Monarchies of Asia | 0 | - | 4.97 | 70,611 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,434 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 110,606 |
| Landlocked Countries | 0 | - | 4.99 | 413,659 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,310 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,899 |
| Top 10 Biggest Economies in Europe | 0 | - | 4.98 | 197,269 |
| Top 10 Biggest Economies in Africa | 0 | - | 4.99 | 119,368 |
| Top 10 Biggest Economies in Asia | 0 | - | 4.85 | 113,258 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.93 | 91,093 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,361 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,717,195 |
| Top 10 Coldest European Countries | 0 | - | 4.94 | 192,256 |
| Top 10 Hottest European Countries | 0 | - | 4.89 | 126,124 |
| Top 10 Coldest Asian Countries | 0 | - | 4.95 | 122,497 |
| WWII First Names | 0 | - | 4.44 | 41,563 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,007 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,134 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,871 |
| Island Countries | 0 | - | 4.99 | 707,640 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,362,436 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,285 |
| One Border Countries - Shape Quiz | 0 | - | 4.84 | 64,511 |
| Merged Country Shapes Quiz #1 | 0 | - | 4.93 | 59,028 |
| Merged Country Shapes Quiz #2 | 0 | - | 4.92 | 59,830 |
| Merged Country Shapes Quiz #3 | 0 | - | 4.86 | 41,656 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,498 |
| Northernmost Countries | 0 | - | 4.99 | 357,743 |
| Political Movements by Country | 0 | - | 4.46 | 72,262 |
| Countries of South America | 0 | - | 5.00 | 914,848 |
| Countries of Oceania | 0 | - | 5.00 | 1,040,552 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,848,510 |
| "Land" Countries | 0 | - | 4.98 | 333,665 |
| Top 10 Richest Countries in the Americas | 0 | - | 4.90 | 76,104 |
| Top 10 Richest Countries in Africa | 0 | - | 4.85 | 75,184 |
| Top 10 Richest Countries in Europe | 0 | - | 4.91 | 148,162 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,689 |
| Biggest Trading Partners - European Union | 0 | - | 4.91 | 72,113 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,271 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,153 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,662 |
| Countries by Independence Day | 0 | - | 4.56 | 52,611 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,325 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,608 |
| Himalayan Countries | 0 | - | 4.95 | 135,377 |
| Andean Countries | 0 | - | 4.94 | 82,830 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,222 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,221 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,908 |
| Former Countries by Capital | 0 | - | 4.45 | 127,051 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,614 |
| Danube Countries | 0 | - | 4.97 | 71,083 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,769 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,539 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,493 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,409 |
| European Landlocked Countries | 0 | - | 4.99 | 145,758 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,218 |
| Countries with the Most Species | 0 | - | 4.99 | 95,242 |
| Countries 197 to 205 | 0 | - | 4.87 | 69,352 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,200 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,370 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,958 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,579 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,953 |
| Countries in the Alps | 0 | - | 4.86 | 116,826 |
| Former Countries | 0 | - | 4.75 | 132,712 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,571 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,260 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,015 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,426 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,168 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,006 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,582 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,760 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,305 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,063 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,196 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,045 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,454 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,752 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,755 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,072 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,649 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,255 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,774 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,321 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,682 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,605 |
| Hindu Countries | 0 | - | 4.86 | 49,590 |
| Largest Countries By Category | 0 | - | 4.97 | 156,763 |
| Countries by Countries | 0 | - | 4.96 | 62,257 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,390 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,963 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,332 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,645 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,772 |
| Five Most Guessed Country Flags by Continent | 0 | - | 4.98 | 52,802 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,801,281 |
| One Border Countries | 0 | - | 4.98 | 464,405 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,588,299 |
| Places Where Winston Churchill Said We Would Fight the Nazis | 0 | - | 4.57 | 14,546 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,250 |
| Countries with Megacities | 0 | - | 4.99 | 246,956 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,141 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,986 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,557 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,880 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,559 |
| Countries by Official Language | 0 | - | 4.95 | 192,777 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,143 |
| Countries in their Native Language | 0 | - | 4.99 | 196,643 |
| Subdivisions by Country | 0 | - | 4.86 | 50,068 |
| National Founders | 0 | - | 4.40 | 83,653 |
| Megadiverse Countries | 0 | - | 4.97 | 133,906 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,088,114 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,809 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,920 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,796 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,429 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,862 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,668 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,149 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,215 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,746 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,577 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,422 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,496 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,505 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,677 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,030 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,602 |
| Countries Bordering "U" Countries | 0 | - | 4.82 | 24,077 |
| World Map Quiz | 0 | - | 4.81 | 63,495 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,691 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,333 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.78 | 42,709 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,814 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,360 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,996 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,955 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,782 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,859 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,065 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,280 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,950 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,338 |
| Widest Countries East to West | 0 | - | 4.92 | 128,606 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,218 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,218 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,569 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,691 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,635 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,047 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,051 |
| Countries with the Most Borders | 0 | - | 4.97 | 385,815 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,584 |
