| Countries of Europe Quiz | 0 | - | 5.00 | 3,732,378 |
| Countries of South America | 0 | - | 5.00 | 918,111 |
| Countries of Oceania | 0 | - | 5.00 | 1,044,589 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,854,988 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,178 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,630 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,976 |
| Five Most Elevated Countries by Continent | 0 | - | 4.98 | 112,566 |
| Five Countries With the Most Tourists by Continent | 0 | - | 4.95 | 119,678 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,073,366 |
| Landlocked Countries | 0 | - | 4.99 | 415,553 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,383 |
| Himalayan Countries | 0 | - | 4.95 | 136,039 |
| Andean Countries | 0 | - | 4.94 | 83,200 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,517 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,684 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,211 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,860 |
| Danube Countries | 0 | - | 4.97 | 71,281 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,022 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,726 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,905 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,846 |
| European Landlocked Countries | 0 | - | 4.99 | 145,986 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,561 |
| Countries with the Most Species | 0 | - | 4.99 | 95,356 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,688 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,275 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,446 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,076 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,726 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,095 |
| Countries in the Alps | 0 | - | 4.86 | 117,151 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,771 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,629 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,169 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,603 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,404 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,154 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,825 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,909 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,710 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,224 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,281 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,149 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,632 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,896 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,910 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,504 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,807 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,356 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,058 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,369 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,254 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,742 |
| Largest Countries By Category | 0 | - | 4.97 | 157,066 |
| Countries by Countries | 0 | - | 4.96 | 62,463 |
| Five Least Guessed Countries by Continent | 0 | - | 4.97 | 97,520 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,701 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,034 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,385 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,965 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,015,473 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 143,057 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 59,818 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,347 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,984 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,880 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,894 |
| Island Countries | 0 | - | 4.99 | 708,400 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,969 |
| Northernmost Countries | 0 | - | 4.99 | 358,800 |
| "Land" Countries | 0 | - | 4.98 | 334,139 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,367,641 |
| Five Most Guessed Countries by Continent | 0 | - | 4.96 | 171,845 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,298 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,957 |
| Countries with Megacities | 0 | - | 4.99 | 248,323 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,859 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,383 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,248 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,318 |
| Countries by Official Language | 0 | - | 4.95 | 193,227 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,784 |
| Countries in their Native Language | 0 | - | 4.99 | 197,054 |
| Independence from Whom | 0 | - | 4.99 | 210,198 |
| Subdivisions by Country | 0 | - | 4.86 | 50,154 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,098 |
| Megadiverse Countries | 0 | - | 4.96 | 134,474 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,226 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,028 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,553 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,915 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,903 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,140 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,370 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,466 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,309 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,789 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,973 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,530 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,635 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,595 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,805 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,131 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,192 |
| World Map Quiz | 0 | - | 4.81 | 63,835 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,795 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,613 |
| Countries by Founding Story | 0 | - | 4.95 | 76,741 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,819 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,546 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,267 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,397 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,139 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,333 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,526 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,092 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,550 |
| Widest Countries East to West | 0 | - | 4.92 | 129,046 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,291 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,517 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,661 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,878 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,857 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,247 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,806 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,647 |
| Countries with Double Letters | 0 | - | 4.96 | 93,733 |
| Countries that End in N | 0 | - | 4.94 | 157,170 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,082 |
| Countries with Six Letters | 0 | - | 4.93 | 210,746 |
| Countries with W | 0 | - | 4.97 | 158,446 |
| Countries with Z | 0 | - | 4.98 | 288,297 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,795 |
| Countries That End in U | 0 | - | 4.95 | 119,626 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,915 |
| Countries that End in O | 0 | - | 4.92 | 158,671 |
| Countries that End in R | 0 | - | 4.87 | 118,385 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,942 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,454 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,587 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,676 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,231 |
| Countries That End in Y | 0 | - | 4.90 | 185,301 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,650 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,935 |
| Countries that End in I | 0 | - | 4.94 | 134,561 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,521 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,322 |
| Countries That End in NIA | 0 | - | 4.92 | 109,143 |
| Countries That End in BIA | 0 | - | 4.92 | 147,874 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,287 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,656 |
| Countries That End in RIA | 0 | - | 4.93 | 126,212 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,200 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,791 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,709 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,060 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,617 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,045 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,303 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,823 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,715 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,911 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,376 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,025 |
| Countries that End in L | 0 | - | 4.94 | 156,174 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,276 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,025 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,643 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,479 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,542 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,047 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,669 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,878 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,691 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,085 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,957 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,832 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,248 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,471 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,439 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,438,250 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,453 |
| One Border Countries | 0 | - | 4.98 | 465,846 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 114,924 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,808,989 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,598,120 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,184 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,654 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,545 |
| Countries by National Anthem | 0 | - | 4.93 | 71,084 |
| NATO Countries | 0 | - | 4.98 | 277,398 |
| EU Countries Quiz | 0 | - | 4.99 | 271,029 |
| Recently Independent Countries | 0 | - | 4.98 | 158,236 |
| French-Speaking Countries | 0 | - | 4.85 | 269,339 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,460 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,610 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,863 |
