| Countries of the World Quiz | 0 | - | 5.00 | 46,845,596 |
| Landlocked Countries | 0 | - | 4.99 | 412,826 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,709,190 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,206 |
| Himalayan Countries | 0 | - | 4.95 | 135,032 |
| Andean Countries | 0 | - | 4.94 | 82,648 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,074 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 122,969 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,745 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,453 |
| Danube Countries | 0 | - | 4.97 | 70,986 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,630 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,450 |
| Countries with the Worst Passports | 0 | - | 4.93 | 82,269 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,182 |
| European Landlocked Countries | 0 | - | 4.99 | 145,658 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,034 |
| Countries with the Most Species | 0 | - | 4.99 | 95,179 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,179 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,172 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,331 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,904 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,500 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,861 |
| Countries in the Alps | 0 | - | 4.87 | 116,674 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,459 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,050 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,935 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,315 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,058 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,932 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,454 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,675 |
| Largest Country by Body of Water | 0 | - | 4.95 | 55,081 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 61,963 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,163 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 40,992 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,356 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,667 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,667 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,846 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,554 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,196 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,656 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 238,793 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,338 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,527 |
| Largest Countries By Category | 0 | - | 4.97 | 156,595 |
| Countries by Countries | 0 | - | 4.96 | 62,155 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,199 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,929 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,304 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,648 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 322,959 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 371,803 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 400,947 |
| Island Countries | 0 | - | 4.99 | 707,205 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,038,247 |
| Northernmost Countries | 0 | - | 4.99 | 357,197 |
| Countries of South America | 0 | - | 5.00 | 913,245 |
| Countries of Oceania | 0 | - | 5.00 | 1,038,424 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,844,821 |
| "Land" Countries | 0 | - | 4.98 | 333,398 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,359,855 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,849 |
| Countries with Megacities | 0 | - | 4.99 | 246,123 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,760 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,726 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,226 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,659 |
| Countries by Official Language | 0 | - | 4.95 | 192,575 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 292,842 |
| Countries in their Native Language | 0 | - | 4.99 | 196,446 |
| Independence from Whom | 0 | - | 4.99 | 209,434 |
| Subdivisions by Country | 0 | - | 4.86 | 50,030 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,576 |
| Megadiverse Countries | 0 | - | 4.97 | 133,827 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,635 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,873 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,367 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,830 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,527 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,937 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,578 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,058 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,171 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,710 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,361 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,358 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,422 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,437 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,600 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 70,975 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,315 |
| World Map Quiz | 0 | - | 4.81 | 63,346 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,178 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,205 |
| Countries by Founding Story | 0 | - | 4.95 | 76,440 |
| Countries by Road Signs | 0 | - | 4.98 | 52,960 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,140 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,869 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,841 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,482 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,755 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 92,956 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,164 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,870 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,248 |
| Widest Countries East to West | 0 | - | 4.92 | 128,512 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,191 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,070 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,516 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,617 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,512 |
| Countries with the Most Desert | 0 | - | 4.93 | 126,941 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,029 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,551 |
| Countries with Double Letters | 0 | - | 4.97 | 93,202 |
| Countries that End in N | 0 | - | 4.94 | 156,267 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,460 |
| Countries with Six Letters | 0 | - | 4.93 | 210,160 |
| Countries with W | 0 | - | 4.97 | 158,084 |
| Countries with Z | 0 | - | 4.98 | 287,257 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,420 |
| Countries That End in U | 0 | - | 4.95 | 119,435 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,308 |
| Countries that End in O | 0 | - | 4.92 | 158,467 |
| Countries that End in R | 0 | - | 4.86 | 118,193 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,805 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,848 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,173 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,373 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,560 |
| Countries That End in Y | 0 | - | 4.90 | 185,144 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,161 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,538 |
| Countries that End in I | 0 | - | 4.94 | 134,294 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,000 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,135 |
| Countries That End in NIA | 0 | - | 4.92 | 108,918 |
| Countries That End in BIA | 0 | - | 4.92 | 147,601 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 165,954 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,390 |
| Countries That End in RIA | 0 | - | 4.93 | 125,998 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,910 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 224,946 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,418 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,792 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,229 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,864 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,013 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,540 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,380 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,765 |
| Countries with the Word "And" | 0 | - | 4.99 | 115,998 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,676 |
| Countries that End in L | 0 | - | 4.94 | 155,633 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,620 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,963 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,449 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,213 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,363 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 246,111 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 198,922 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,820 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,040 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,228 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,422 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,556 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,142 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,386 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,252 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,433,360 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 376,962 |
| One Border Countries | 0 | - | 4.98 | 463,524 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,797,087 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,583,063 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 24,564 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,712 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,657 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,739 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,387 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,475 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,141 |
| Countries by National Anthem | 0 | - | 4.92 | 70,997 |
| NATO Countries | 0 | - | 4.98 | 275,043 |
| EU Countries Quiz | 0 | - | 4.99 | 269,378 |
| Recently Independent Countries | 0 | - | 4.98 | 157,853 |
| French-Speaking Countries | 0 | - | 4.85 | 268,593 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,330 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,696 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,417 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 267,598 |
| German-Speaking Countries | 0 | - | 4.89 | 123,463 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,530 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,261 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,793 |
| Top Five Countries by Religion | 0 | - | 4.93 | 168,738 |
| Solve the Secret Country #2 | 0 | - | 4.84 | 115,789 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 111,381 |
