| Countries of Europe Quiz | 0 | - | 5.00 | 3,761,665 |
| Countries of South America | 0 | - | 5.00 | 923,962 |
| Countries of Oceania | 0 | - | 5.00 | 1,052,561 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,869,042 |
| Landlocked Countries | 0 | - | 4.99 | 419,663 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,390,997 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,298 |
| Himalayan Countries | 0 | - | 4.95 | 137,736 |
| Andean Countries | 0 | - | 4.95 | 84,081 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,322 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,854 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,953 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,435 |
| Danube Countries | 0 | - | 4.97 | 71,734 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,658 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,134 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,783 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,864 |
| European Landlocked Countries | 0 | - | 4.99 | 146,858 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,231 |
| Countries with the Most Species | 0 | - | 4.99 | 102,998 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,391 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,455 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,617 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,366 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,042 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,436 |
| Countries in the Alps | 0 | - | 4.87 | 117,811 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,213 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,526 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,466 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,243 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,193 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,775 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,368 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,260 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,018 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,624 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,522 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,368 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,991 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,255 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,273 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,340 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,114 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,621 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,645 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,708 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,426 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,038 |
| Largest Countries By Category | 0 | - | 4.97 | 157,780 |
| Countries by Countries | 0 | - | 4.96 | 62,921 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,323 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,180 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,486 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,406 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,631 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,809 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,668 |
| Island Countries | 0 | - | 4.99 | 710,065 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,880 |
| Northernmost Countries | 0 | - | 4.99 | 360,832 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,021,960 |
| "Land" Countries | 0 | - | 4.98 | 335,977 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,377,422 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,239 |
| Countries with Megacities | 0 | - | 4.99 | 262,305 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,071 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,108 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,380 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,158 |
| Countries by Official Language | 0 | - | 4.95 | 194,785 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,732 |
| Countries in their Native Language | 0 | - | 4.99 | 198,329 |
| Independence from Whom | 0 | - | 4.99 | 211,510 |
| Subdivisions by Country | 0 | - | 4.86 | 50,319 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,844 |
| Megadiverse Countries | 0 | - | 4.96 | 134,818 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,660 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,219 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,792 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,036 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,801 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,429 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,078 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,888 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,528 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,014 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,161 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,757 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,037 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,826 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,197 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,370 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,400 |
| World Map Quiz | 0 | - | 4.81 | 64,718 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,941 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,109 |
| Countries by Founding Story | 0 | - | 4.95 | 77,132 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,649 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 105,014 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,744 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,563 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,612 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,761 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,899 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,311 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,350 |
| Widest Countries East to West | 0 | - | 4.92 | 129,440 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,405 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,055 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,027 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,578 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,311 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,625 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,274 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,739 |
| Countries with Double Letters | 0 | - | 4.97 | 95,228 |
| Countries that End in N | 0 | - | 4.95 | 170,225 |
| Countries with Five Letters | 0 | - | 4.96 | 280,927 |
| Countries with Six Letters | 0 | - | 4.94 | 212,666 |
| Countries with W | 0 | - | 4.97 | 159,617 |
| Countries with Z | 0 | - | 4.98 | 290,297 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,858 |
| Countries That End in U | 0 | - | 4.95 | 120,461 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,884 |
| Countries that End in O | 0 | - | 4.92 | 159,244 |
| Countries that End in R | 0 | - | 4.87 | 118,762 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,541 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,466 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,223 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,151 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,752 |
| Countries That End in Y | 0 | - | 4.91 | 185,676 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,395 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,514 |
| Countries that End in I | 0 | - | 4.94 | 134,907 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,446 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,616 |
| Countries That End in NIA | 0 | - | 4.92 | 109,562 |
| Countries That End in BIA | 0 | - | 4.93 | 148,912 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,811 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,132 |
| Countries That End in RIA | 0 | - | 4.93 | 126,586 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,722 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,905 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,324 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,703 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,236 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,380 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,734 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,308 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,227 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,239 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,912 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,635 |
| Countries that End in L | 0 | - | 4.94 | 156,595 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,382 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,168 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,878 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,774 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,822 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,922 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,288 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,716 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,221 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,719 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,640 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,986 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,616 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,712 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,444,406 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,004 |
| One Border Countries | 0 | - | 4.98 | 468,103 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,825,569 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,618,844 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,632 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,590 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,781 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,335 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,456 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,009 |
| Countries by National Anthem | 0 | - | 4.92 | 71,207 |
| NATO Countries | 0 | - | 4.98 | 279,747 |
| EU Countries Quiz | 0 | - | 4.99 | 273,422 |
| Recently Independent Countries | 0 | - | 4.98 | 159,125 |
| French-Speaking Countries | 0 | - | 4.85 | 270,341 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,786 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,792 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,862 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,468 |
| German-Speaking Countries | 0 | - | 4.91 | 145,445 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,740 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,110 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 165,440 |
| Top Five Countries by Religion | 0 | - | 4.93 | 171,037 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,101 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 112,475 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,716 |
| Olympic Host Countries | 0 | - | 4.98 | 200,570 |
