| Countries of the World Quiz | 0 | - | 5.00 | 47,781,744 |
| Landlocked Countries | 0 | - | 4.99 | 424,532 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,796,323 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,635 |
| Himalayan Countries | 0 | - | 4.94 | 139,777 |
| Andean Countries | 0 | - | 4.94 | 85,187 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,366 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,645 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,934 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,225 |
| Danube Countries | 0 | - | 4.97 | 72,274 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,419 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,705 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,856 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,358 |
| European Landlocked Countries | 0 | - | 4.99 | 147,457 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,088 |
| Countries with the Most Species | 0 | - | 4.99 | 103,487 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,233 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,710 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,822 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,746 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,477 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,907 |
| Countries in the Alps | 0 | - | 4.87 | 118,582 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,319 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,599 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,874 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,888 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,817 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,138 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 101,221 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,763 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,335 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,068 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,795 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,662 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,452 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,686 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,774 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,524 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,523 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,539 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,487 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,210 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,845 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,429 |
| Largest Countries By Category | 0 | - | 4.97 | 158,654 |
| Countries by Countries | 0 | - | 4.96 | 63,510 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,097 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,361 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,644 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,987 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 334,387 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,310 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,982 |
| Island Countries | 0 | - | 4.99 | 712,081 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,053,299 |
| Northernmost Countries | 0 | - | 4.99 | 363,413 |
| Countries of South America | 0 | - | 5.00 | 930,938 |
| Countries of Oceania | 0 | - | 5.00 | 1,061,297 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,885,460 |
| "Land" Countries | 0 | - | 4.98 | 338,064 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,390,770 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,816 |
| Countries with Megacities | 0 | - | 4.99 | 266,418 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,523 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,919 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,815 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 82,040 |
| Countries by Official Language | 0 | - | 4.95 | 195,774 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,312 |
| Countries in their Native Language | 0 | - | 4.99 | 199,557 |
| Independence from Whom | 0 | - | 4.99 | 212,768 |
| Subdivisions by Country | 0 | - | 4.87 | 50,569 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,231 |
| Megadiverse Countries | 0 | - | 4.96 | 135,199 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,763 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,482 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,383 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,184 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,445 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,764 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,920 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,510 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,779 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,223 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,216 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,312 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,378 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,103 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,515 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,635 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 112,039 |
| World Map Quiz | 0 | - | 4.81 | 65,461 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,627 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,588 |
| Countries by Founding Story | 0 | - | 4.95 | 77,678 |
| Countries by Road Signs | 0 | - | 4.98 | 54,255 |
| Southernmost Countries of the World | 0 | - | 4.99 | 229,005 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,948 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,436 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,238 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,293 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,412 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,608 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,621 |
| Tallest Countries North to South | 0 | - | 4.86 | 130,159 |
| Widest Countries East to West | 0 | - | 4.92 | 130,324 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,562 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,109 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,471 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,983 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,869 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,365 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,468 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,866 |
| Countries with Double Letters | 0 | - | 4.96 | 96,819 |
| Countries that End in N | 0 | - | 4.95 | 171,695 |
| Countries with Five Letters | 0 | - | 4.96 | 283,406 |
| Countries with Six Letters | 0 | - | 4.94 | 214,178 |
| Countries with W | 0 | - | 4.96 | 160,756 |
| Countries with Z | 0 | - | 4.98 | 292,139 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,104 |
| Countries That End in U | 0 | - | 4.95 | 121,081 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,917 |
| Countries that End in O | 0 | - | 4.92 | 159,728 |
| Countries that End in R | 0 | - | 4.87 | 119,116 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,866 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,600 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 171,012 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,723 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,649 |
| Countries That End in Y | 0 | - | 4.91 | 186,029 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,301 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,142 |
| Countries that End in I | 0 | - | 4.94 | 135,257 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,468 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,980 |
| Countries That End in NIA | 0 | - | 4.92 | 109,966 |
| Countries That End in BIA | 0 | - | 4.93 | 149,466 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,402 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,671 |
| Countries That End in RIA | 0 | - | 4.93 | 126,984 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,268 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,293 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 134,034 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,467 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 92,041 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,740 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,235 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,511 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,790 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,586 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,590 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 54,276 |
| Countries that End in L | 0 | - | 4.94 | 157,042 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 217,023 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,317 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,868 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,555 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,270 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,238 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 201,013 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,350 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,142 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,821 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,121 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,192 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,786 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,160 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,452,281 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 382,021 |
| One Border Countries | 0 | - | 4.98 | 471,330 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,844,341 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,647,037 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,633 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,208 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,782 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,521 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,804 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,090 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,493 |
| Countries by National Anthem | 0 | - | 4.92 | 71,377 |
| NATO Countries | 0 | - | 4.98 | 282,860 |
| EU Countries Quiz | 0 | - | 4.99 | 277,126 |
| Recently Independent Countries | 0 | - | 4.98 | 159,814 |
| French-Speaking Countries | 0 | - | 4.85 | 271,451 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,007 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,430 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 290,750 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 276,186 |
| German-Speaking Countries | 0 | - | 4.92 | 145,946 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,167 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,448 |
| Solve the Secret Country #1 | 0 | - | 4.93 | 167,567 |
| Top Five Countries by Religion | 0 | - | 4.93 | 173,012 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,895 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,681 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 112,939 |
