| Landlocked Countries | 0 | - | 4.99 | 422,057 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,589,018 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,498 |
| Himalayan Countries | 0 | - | 4.94 | 138,768 |
| Andean Countries | 0 | - | 4.93 | 84,630 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,828 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,852 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,448 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,820 |
| Danube Countries | 0 | - | 4.97 | 72,021 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 117,021 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,429 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,331 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,807 |
| European Landlocked Countries | 0 | - | 4.99 | 147,151 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,662 |
| Countries with the Most Species | 0 | - | 4.99 | 103,247 |
| Countries 197 to 205 | 0 | - | 4.90 | 70,778 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,598 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,726 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,546 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,236 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,670 |
| Countries in the Alps | 0 | - | 4.87 | 118,220 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 101,167 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,049 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,659 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,599 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,523 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,951 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,687 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,499 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,183 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,860 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,662 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,531 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,238 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,480 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,534 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,926 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,316 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 63,890 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,090 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,980 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,139 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,237 |
| Largest Countries By Category | 0 | - | 4.97 | 158,225 |
| Countries by Countries | 0 | - | 4.96 | 63,234 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,699 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,291 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,571 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,680 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,779,346 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,631 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,523 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 407,323 |
| Island Countries | 0 | - | 4.99 | 711,072 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,964 |
| Northernmost Countries | 0 | - | 4.99 | 361,995 |
| Countries of South America | 0 | - | 5.00 | 927,445 |
| Countries of Oceania | 0 | - | 5.00 | 1,057,055 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,877,562 |
| "Land" Countries | 0 | - | 4.98 | 337,359 |
| Countries With the Most Expats | 0 | - | 4.69 | 49,550 |
| Countries with the Most Immigrants per Capita | 0 | - | 4.53 | 62,494 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,383,857 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,915 |
| Countries with Megacities | 0 | - | 4.99 | 264,602 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,752 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,476 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,015 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,549 |
| Countries by Official Language | 0 | - | 4.95 | 195,270 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,392 |
| Countries in their Native Language | 0 | - | 4.99 | 199,055 |
| Independence from Whom | 0 | - | 4.99 | 212,118 |
| Subdivisions by Country | 0 | - | 4.86 | 50,432 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,744 |
| Megadiverse Countries | 0 | - | 4.96 | 135,016 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,107 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,364 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,238 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,110 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,148 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,602 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,481 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,033 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,662 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,148 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,681 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,887 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,207 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,968 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,354 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,499 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,201 |
| World Map Quiz | 0 | - | 4.81 | 65,099 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,326 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,355 |
| Countries by Founding Story | 0 | - | 4.95 | 77,381 |
| Countries by Road Signs | 0 | - | 4.98 | 54,017 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,107 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,283 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,002 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,212 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,899 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,019 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,307 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,442 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,583 |
| Widest Countries East to West | 0 | - | 4.92 | 129,655 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,460 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,389 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,123 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,770 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,606 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,878 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,376 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,798 |
| Countries with Double Letters | 0 | - | 4.96 | 96,242 |
| Countries that End in N | 0 | - | 4.95 | 171,129 |
| Countries with Five Letters | 0 | - | 4.96 | 282,484 |
| Countries with Six Letters | 0 | - | 4.94 | 213,553 |
| Countries with W | 0 | - | 4.97 | 160,328 |
| Countries with Z | 0 | - | 4.98 | 291,452 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,700 |
| Countries That End in U | 0 | - | 4.95 | 120,855 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,467 |
| Countries that End in O | 0 | - | 4.92 | 159,508 |
| Countries that End in R | 0 | - | 4.87 | 118,971 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,730 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,094 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,699 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,472 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,399 |
| Countries That End in Y | 0 | - | 4.91 | 185,872 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,916 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,858 |
| Countries that End in I | 0 | - | 4.94 | 135,090 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,104 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,822 |
| Countries That End in NIA | 0 | - | 4.92 | 109,786 |
| Countries That End in BIA | 0 | - | 4.93 | 149,200 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,119 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,425 |
| Countries That End in RIA | 0 | - | 4.93 | 126,806 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,020 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,616 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,707 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,124 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,673 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,577 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,029 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,443 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,526 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,420 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,282 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,979 |
| Countries that End in L | 0 | - | 4.94 | 156,840 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,773 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,263 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,024 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,953 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,999 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,747 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,648 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,990 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,541 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,439 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,858 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,100 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,707 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,871 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,448,286 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,993 |
| One Border Countries | 0 | - | 4.98 | 469,913 |
| Countries by Net Migration | 0 | - | 4.52 | 83,974 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,835,005 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,632,557 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,945 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,201 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,156 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,564 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,738 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,225 |
| Countries by National Anthem | 0 | - | 4.93 | 71,291 |
| NATO Countries | 0 | - | 4.98 | 281,552 |
| EU Countries Quiz | 0 | - | 4.99 | 275,530 |
| Recently Independent Countries | 0 | - | 4.98 | 159,480 |
| French-Speaking Countries | 0 | - | 4.85 | 270,862 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,896 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,549 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 289,322 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 274,466 |
| German-Speaking Countries | 0 | - | 4.91 | 145,745 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,968 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,290 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,352 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,220 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 118,915 |
