| Countries of Europe Quiz | 0 | - | 5.00 | 3,727,595 |
| Countries of South America | 0 | - | 5.00 | 917,168 |
| Countries of Oceania | 0 | - | 5.00 | 1,043,304 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,852,940 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,806,330 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,594,872 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,025,843 |
| Countries of the World in 1900 | 0 | - | 4.89 | 83,767 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 193,544 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 149,299 |
| Landlocked Countries | 0 | - | 4.99 | 414,955 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 556,738 |
| Countries and Capitals of the World With a Map | 0 | - | 5.00 | 65,371 |
| Pixelated World Map | 0 | - | 5.00 | 142,632 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 98,907 |
| Countries of the World in 1444 | 0 | - | 4.98 | 59,701 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 56,981 |
| Countries of Europe before World War II with a Map | 0 | - | 4.94 | 52,510 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,014,330 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 81,480 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,131 |
| Himalayan Countries | 0 | - | 4.95 | 135,831 |
| Andean Countries | 0 | - | 4.94 | 83,099 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,422 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,530 |
| Coffee Producing Countries | 0 | - | 4.82 | 66,123 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,783 |
| Danube Countries | 0 | - | 4.97 | 71,220 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,947 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,670 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,774 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,695 |
| European Landlocked Countries | 0 | - | 4.99 | 145,921 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,441 |
| Countries with the Most Species | 0 | - | 4.99 | 95,317 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,586 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,251 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,423 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,038 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,689 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,051 |
| Countries in the Alps | 0 | - | 4.86 | 117,047 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,716 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,513 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,133 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,548 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,333 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,115 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,744 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,866 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,653 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,175 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,255 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,119 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,579 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,852 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,864 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,361 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,763 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,333 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,975 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,045 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,092 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,702 |
| Largest Countries By Category | 0 | - | 4.97 | 156,965 |
| Countries by Countries | 0 | - | 4.96 | 62,404 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,597 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,008 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,369 |
| All Countries by Population With a Map | 0 | - | 4.98 | 107,173 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,247 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,903 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,502 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,594 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,545 |
| Island Countries | 0 | - | 4.99 | 708,141 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,244 |
| Northernmost Countries | 0 | - | 4.99 | 358,490 |
| "Land" Countries | 0 | - | 4.98 | 334,005 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,365,928 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 104,546 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,321 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,793 |
| Countries with Megacities | 0 | - | 4.99 | 247,956 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,676 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,292 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,056 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,241 |
| Countries by Official Language | 0 | - | 4.95 | 193,060 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,544 |
| Countries in their Native Language | 0 | - | 4.99 | 196,908 |
| Independence from Whom | 0 | - | 4.99 | 210,046 |
| Subdivisions by Country | 0 | - | 4.86 | 50,122 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,992 |
| Megadiverse Countries | 0 | - | 4.97 | 134,022 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,074 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,987 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,499 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,895 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,826 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,096 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,274 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,350 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,275 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,775 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,826 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,486 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,591 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,570 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,765 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,106 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 100,934 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,999 |
| World Map Quiz | 0 | - | 4.81 | 63,715 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 135,482 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,424 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,514 |
| Countries of the World With a Disappearing Map | 0 | - | 5.00 | 111,295 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.84 | 63,286 |
| Countries by Sports in 60 Seconds | 0 | - | 4.91 | 142,023 |
| Countries by Founding Story | 0 | - | 4.95 | 76,674 |
| Countries by Road Signs | 0 | - | 4.98 | 53,249 |
| Countries That Do Not Border | 0 | - | 4.99 | 59,511 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,703 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,459 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,195 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,200 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,071 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,272 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,465 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,044 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,501 |
| Widest Countries East to West | 0 | - | 4.92 | 128,993 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,277 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,425 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,635 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,834 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,781 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,192 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 76,164 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,632 |
| Countries With the Tallest People | 0 | - | 4.91 | 94,596 |
| Countries with Double Letters | 0 | - | 4.96 | 93,633 |
| Countries that End in N | 0 | - | 4.94 | 157,099 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,967 |
| Countries with Six Letters | 0 | - | 4.93 | 210,630 |
| Countries with W | 0 | - | 4.97 | 158,390 |
| Countries with Z | 0 | - | 4.98 | 288,171 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,717 |
| Countries That End in U | 0 | - | 4.95 | 119,595 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,831 |
| Countries that End in O | 0 | - | 4.92 | 158,633 |
| Countries that End in R | 0 | - | 4.87 | 118,357 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,919 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,359 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,503 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,618 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,166 |
| Countries That End in Y | 0 | - | 4.90 | 185,273 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,571 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,864 |
| Countries that End in I | 0 | - | 4.94 | 134,521 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,410 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,282 |
| Countries That End in NIA | 0 | - | 4.92 | 109,099 |
| Countries That End in BIA | 0 | - | 4.92 | 147,830 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,218 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,612 |
| Countries That End in RIA | 0 | - | 4.93 | 126,181 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,148 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,628 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,644 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,998 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,527 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,011 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,260 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,766 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,660 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,877 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,303 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,960 |
| Countries with the Highest Scrabble Score | 0 | - | 4.97 | 63,127 |
| Countries that End in L | 0 | - | 4.94 | 156,139 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 211,946 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,017 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,607 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,425 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,503 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 247,877 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,585 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 141,392 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,609 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 223,967 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,886 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,796 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,230 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,453 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,401 |
| Smallest Countries with at Least Two Borders | 0 | - | 4.96 | 38,274 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,437,352 |
