| Countries of the World Quiz | 0 | - | 5.00 | 46,948,555 |
| Landlocked Countries | 0 | - | 4.99 | 413,921 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,719,744 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,725 |
| Himalayan Countries | 0 | - | 4.95 | 135,477 |
| Andean Countries | 0 | - | 4.94 | 82,877 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,265 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,279 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,961 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,649 |
| Danube Countries | 0 | - | 4.97 | 71,108 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,807 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,569 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,555 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,461 |
| European Landlocked Countries | 0 | - | 4.99 | 145,792 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,253 |
| Countries with the Most Species | 0 | - | 4.99 | 95,259 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,396 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,207 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,381 |
| Countries that Use the Peso | 0 | - | 4.88 | 58,974 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,595 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,975 |
| Countries in the Alps | 0 | - | 4.86 | 116,881 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,600 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,317 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,036 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,448 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,212 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,035 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,613 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,782 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,414 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,098 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,205 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,058 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,473 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,783 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,775 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,142 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,683 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,275 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,814 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,483 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,780 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,620 |
| Largest Countries By Category | 0 | - | 4.97 | 156,818 |
| Countries by Countries | 0 | - | 4.96 | 62,291 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,448 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,976 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,343 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,798 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 324,500 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,229 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,034 |
| Island Countries | 0 | - | 4.99 | 707,746 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,936 |
| Northernmost Countries | 0 | - | 4.99 | 357,918 |
| Countries of South America | 0 | - | 5.00 | 915,363 |
| Countries of Oceania | 0 | - | 5.00 | 1,041,266 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,849,633 |
| "Land" Countries | 0 | - | 4.98 | 333,732 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,363,249 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,479 |
| Countries with Megacities | 0 | - | 4.99 | 247,314 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,316 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,110 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,741 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,039 |
| Countries by Official Language | 0 | - | 4.95 | 192,839 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,213 |
| Countries in their Native Language | 0 | - | 4.99 | 196,702 |
| Independence from Whom | 0 | - | 4.99 | 209,787 |
| Subdivisions by Country | 0 | - | 4.86 | 50,084 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,823 |
| Megadiverse Countries | 0 | - | 4.97 | 133,929 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,871 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,934 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,441 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,868 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,708 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,028 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,102 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,177 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,229 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,752 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,654 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,442 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,517 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,520 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,707 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,039 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,674 |
| World Map Quiz | 0 | - | 4.81 | 63,547 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,873 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,364 |
| Countries by Founding Story | 0 | - | 4.95 | 76,579 |
| Countries by Road Signs | 0 | - | 4.98 | 53,131 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,426 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,056 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,984 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,864 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,903 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,099 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,307 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,961 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,361 |
| Widest Countries East to West | 0 | - | 4.92 | 128,636 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,220 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,270 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,587 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,715 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,665 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,086 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,057 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,594 |
| Countries with Double Letters | 0 | - | 4.96 | 93,445 |
| Countries that End in N | 0 | - | 4.94 | 156,949 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,758 |
| Countries with Six Letters | 0 | - | 4.93 | 210,419 |
| Countries with W | 0 | - | 4.97 | 158,273 |
| Countries with Z | 0 | - | 4.98 | 287,950 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,598 |
| Countries That End in U | 0 | - | 4.95 | 119,540 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,644 |
| Countries that End in O | 0 | - | 4.92 | 158,578 |
| Countries that End in R | 0 | - | 4.87 | 118,294 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,870 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,149 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,377 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,529 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,069 |
| Countries That End in Y | 0 | - | 4.90 | 185,223 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,430 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,726 |
| Countries that End in I | 0 | - | 4.94 | 134,447 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,262 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,219 |
| Countries That End in NIA | 0 | - | 4.92 | 109,031 |
| Countries That End in BIA | 0 | - | 4.92 | 147,741 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,110 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,516 |
| Countries That End in RIA | 0 | - | 4.93 | 126,108 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 110,042 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,256 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,548 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,918 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,399 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,951 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,154 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,681 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,542 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,827 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,189 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,856 |
| Countries that End in L | 0 | - | 4.94 | 155,771 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,420 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,997 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,537 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,332 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,452 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,228 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,180 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 128,052 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,269 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,477 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,587 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,650 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,179 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,430 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,347 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,435,687 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,804 |
| One Border Countries | 0 | - | 4.98 | 464,662 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,802,472 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,589,613 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,904 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,074 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,960 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,526 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,679 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,349 |
| Countries by National Anthem | 0 | - | 4.93 | 71,039 |
| NATO Countries | 0 | - | 4.98 | 276,049 |
| EU Countries Quiz | 0 | - | 4.99 | 270,147 |
| Recently Independent Countries | 0 | - | 4.98 | 158,034 |
| French-Speaking Countries | 0 | - | 4.85 | 268,880 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,388 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,119 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 285,114 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,572 |
| German-Speaking Countries | 0 | - | 4.89 | 123,521 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,635 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,332 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,304 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,155 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,226 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,597 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 110,986 |
