| Countries of the World Quiz | 0 | - | 5.00 | 47,647,260 |
| Landlocked Countries | 0 | - | 4.99 | 422,793 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,784,468 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,923 |
| Himalayan Countries | 0 | - | 4.95 | 139,089 |
| Andean Countries | 0 | - | 4.93 | 84,830 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,058 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,166 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,637 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,953 |
| Danube Countries | 0 | - | 4.97 | 72,114 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,158 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,520 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,490 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,988 |
| European Landlocked Countries | 0 | - | 4.99 | 147,252 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,799 |
| Countries with the Most Species | 0 | - | 4.99 | 103,327 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,923 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,640 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,758 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,604 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,337 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,756 |
| Countries in the Alps | 0 | - | 4.87 | 118,334 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,637 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,231 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,734 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,688 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,610 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,014 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,775 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,582 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,231 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,938 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,702 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,580 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,310 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,549 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,616 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,104 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,380 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 64,594 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,226 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 244,384 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,371 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,297 |
| Largest Countries By Category | 0 | - | 4.97 | 158,364 |
| Countries by Countries | 0 | - | 4.96 | 63,334 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,798 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,314 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,588 |
| All Countries by Population With a Map | 0 | - | 4.99 | 109,867 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 99,105 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,764 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 332,343 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,755 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,834 |
| Island Countries | 0 | - | 4.99 | 711,330 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,050,913 |
| Northernmost Countries | 0 | - | 4.99 | 362,360 |
| Countries of South America | 0 | - | 5.00 | 928,515 |
| Countries of Oceania | 0 | - | 5.00 | 1,058,383 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,879,796 |
| "Land" Countries | 0 | - | 4.98 | 337,574 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,385,715 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,141 |
| Countries with Megacities | 0 | - | 4.99 | 265,156 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,957 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,605 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,221 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,675 |
| Countries by Official Language | 0 | - | 4.95 | 195,420 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,609 |
| Countries in their Native Language | 0 | - | 4.99 | 199,202 |
| Independence from Whom | 0 | - | 4.99 | 212,293 |
| Subdivisions by Country | 0 | - | 4.87 | 50,469 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,870 |
| Megadiverse Countries | 0 | - | 4.96 | 135,081 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,229 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,399 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,277 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,135 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,234 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,644 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,579 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,401 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,701 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,174 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 77,859 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,935 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,252 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,006 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,402 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,536 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,459 |
| World Map Quiz | 0 | - | 4.81 | 65,209 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,716 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,430 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 64,229 |
| Countries by Founding Story | 0 | - | 4.95 | 77,442 |
| Countries by Road Signs | 0 | - | 4.98 | 54,090 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,262 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,373 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,084 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,479 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,985 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,090 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,374 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,487 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,631 |
| Widest Countries East to West | 0 | - | 4.92 | 129,728 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,476 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,480 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,156 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,822 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,670 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,946 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,402 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,815 |
| Countries With the Tallest People | 0 | - | 4.93 | 95,022 |
| Countries with Double Letters | 0 | - | 4.96 | 96,423 |
| Countries that End in N | 0 | - | 4.95 | 171,306 |
| Countries with Five Letters | 0 | - | 4.96 | 282,817 |
| Countries with Six Letters | 0 | - | 4.94 | 213,755 |
| Countries with W | 0 | - | 4.96 | 160,464 |
| Countries with Z | 0 | - | 4.98 | 291,667 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,828 |
| Countries That End in U | 0 | - | 4.95 | 120,918 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,592 |
| Countries that End in O | 0 | - | 4.92 | 159,573 |
| Countries that End in R | 0 | - | 4.87 | 119,008 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,769 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,265 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,779 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,551 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,468 |
| Countries That End in Y | 0 | - | 4.91 | 185,929 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,031 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,951 |
| Countries that End in I | 0 | - | 4.94 | 135,148 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,212 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,867 |
| Countries That End in NIA | 0 | - | 4.92 | 109,844 |
| Countries That End in BIA | 0 | - | 4.93 | 149,281 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,194 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,491 |
| Countries That End in RIA | 0 | - | 4.93 | 126,864 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,083 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,829 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,811 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,242 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,796 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,627 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,091 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,464 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,602 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,475 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,385 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,073 |
| Countries that End in L | 0 | - | 4.94 | 156,901 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,158 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,286 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,080 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,007 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,048 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,908 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,774 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,209 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,916 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,580 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,939 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,130 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,729 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,918 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,449,520 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,297 |
| One Border Countries | 0 | - | 4.98 | 470,328 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,837,899 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,637,072 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,517 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,024 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,383 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,268 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,638 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 93,833 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,294 |
| Countries by National Anthem | 0 | - | 4.93 | 71,316 |
| NATO Countries | 0 | - | 4.98 | 281,923 |
| EU Countries Quiz | 0 | - | 4.99 | 276,003 |
| Recently Independent Countries | 0 | - | 4.98 | 159,565 |
| French-Speaking Countries | 0 | - | 4.85 | 271,053 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,925 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,828 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,714 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,956 |
| German-Speaking Countries | 0 | - | 4.91 | 145,819 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,022 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,335 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,714 |
