| Countries of the World Quiz | 0 | - | 5.00 | 47,638,816 |
| Landlocked Countries | 0 | - | 4.99 | 422,683 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,783,715 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,870 |
| Himalayan Countries | 0 | - | 4.95 | 139,041 |
| Andean Countries | 0 | - | 4.93 | 84,814 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,041 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,119 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,619 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,936 |
| Danube Countries | 0 | - | 4.97 | 72,103 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,133 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,503 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,459 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,958 |
| European Landlocked Countries | 0 | - | 4.99 | 147,237 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,779 |
| Countries with the Most Species | 0 | - | 4.99 | 103,315 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,902 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,633 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,752 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,600 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,325 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,747 |
| Countries in the Alps | 0 | - | 4.87 | 118,320 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,572 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,204 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,725 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,680 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,590 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,003 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,761 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,574 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,229 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,928 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,693 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,577 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,303 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,545 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,611 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,072 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,375 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,537 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,214 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,334 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,346 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,291 |
| Largest Countries By Category | 0 | - | 4.97 | 158,356 |
| Countries by Countries | 0 | - | 4.96 | 63,326 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,782 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,311 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,585 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,096 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,755 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,246 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,716 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,770 |
| Island Countries | 0 | - | 4.99 | 711,291 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,773 |
| Northernmost Countries | 0 | - | 4.99 | 362,311 |
| Countries of South America | 0 | - | 5.00 | 928,356 |
| Countries of Oceania | 0 | - | 5.00 | 1,058,210 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,879,492 |
| "Land" Countries | 0 | - | 4.98 | 337,549 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,385,461 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,110 |
| Countries with Megacities | 0 | - | 4.99 | 265,060 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,919 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,591 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,186 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,662 |
| Countries by Official Language | 0 | - | 4.95 | 195,397 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,567 |
| Countries in their Native Language | 0 | - | 4.99 | 199,179 |
| Independence from Whom | 0 | - | 4.99 | 212,271 |
| Subdivisions by Country | 0 | - | 4.87 | 50,465 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,858 |
| Megadiverse Countries | 0 | - | 4.96 | 135,074 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,213 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,394 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,273 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,131 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,221 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,640 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,572 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,263 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,695 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,172 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,835 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,931 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,247 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,005 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,396 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,529 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,414 |
| World Map Quiz | 0 | - | 4.81 | 65,188 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,651 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,415 |
| Countries by Founding Story | 0 | - | 4.95 | 77,435 |
| Countries by Road Signs | 0 | - | 4.98 | 54,081 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,234 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,359 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,071 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,440 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,973 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,076 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,360 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,483 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,621 |
| Widest Countries East to West | 0 | - | 4.92 | 129,717 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,473 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,466 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,149 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,816 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,652 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,939 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,398 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,814 |
| Countries with Double Letters | 0 | - | 4.96 | 96,392 |
| Countries that End in N | 0 | - | 4.95 | 171,281 |
| Countries with Five Letters | 0 | - | 4.96 | 282,769 |
| Countries with Six Letters | 0 | - | 4.94 | 213,722 |
| Countries with W | 0 | - | 4.97 | 160,447 |
| Countries with Z | 0 | - | 4.98 | 291,632 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,809 |
| Countries That End in U | 0 | - | 4.95 | 120,903 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,574 |
| Countries that End in O | 0 | - | 4.92 | 159,560 |
| Countries that End in R | 0 | - | 4.87 | 119,003 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,767 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,247 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,769 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,536 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,457 |
| Countries That End in Y | 0 | - | 4.91 | 185,920 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,014 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,934 |
| Countries that End in I | 0 | - | 4.94 | 135,135 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,195 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,859 |
| Countries That End in NIA | 0 | - | 4.92 | 109,838 |
| Countries That End in BIA | 0 | - | 4.93 | 149,272 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,178 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,484 |
| Countries That End in RIA | 0 | - | 4.93 | 126,858 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,075 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,801 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,794 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,228 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,773 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,618 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,080 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,462 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,589 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,467 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,366 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,059 |
| Countries that End in L | 0 | - | 4.94 | 156,893 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,104 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,286 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,073 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,996 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,043 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,885 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,757 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,202 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,909 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,565 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,930 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,129 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,725 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,910 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,343 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,256 |
| One Border Countries | 0 | - | 4.98 | 470,254 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,837,482 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,636,521 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,511 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,010 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,361 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,254 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,625 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 93,816 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,285 |
| Countries by National Anthem | 0 | - | 4.93 | 71,315 |
| NATO Countries | 0 | - | 4.98 | 281,873 |
| EU Countries Quiz | 0 | - | 4.99 | 275,937 |
| Recently Independent Countries | 0 | - | 4.98 | 159,555 |
| French-Speaking Countries | 0 | - | 4.85 | 271,034 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,922 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,771 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,660 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,877 |
| German-Speaking Countries | 0 | - | 4.91 | 145,807 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,012 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,327 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,661 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,435 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,161 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,397 |
