| Countries of Europe Quiz | 0 | - | 5.00 | 3,736,366 |
| Countries of South America | 0 | - | 5.00 | 918,822 |
| Countries of Oceania | 0 | - | 5.00 | 1,045,633 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,856,594 |
| Landlocked Countries | 0 | - | 4.99 | 416,027 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,115,712 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,626 |
| Himalayan Countries | 0 | - | 4.95 | 136,241 |
| Andean Countries | 0 | - | 4.95 | 83,324 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,600 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,817 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,305 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,925 |
| Danube Countries | 0 | - | 4.97 | 71,334 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,114 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,790 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,019 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,973 |
| European Landlocked Countries | 0 | - | 4.99 | 146,052 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,659 |
| Countries with the Most Species | 0 | - | 4.99 | 97,493 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,805 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,298 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,476 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,113 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,761 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,131 |
| Countries in the Alps | 0 | - | 4.86 | 117,252 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,839 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,753 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,211 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,664 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,550 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,204 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,911 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,951 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,753 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,284 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,323 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,181 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,675 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,936 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,944 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,607 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,851 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,385 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,131 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,675 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,415 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,780 |
| Largest Countries By Category | 0 | - | 4.97 | 157,174 |
| Countries by Countries | 0 | - | 4.96 | 62,528 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,787 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,060 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,398 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,032 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,394 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,539 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,260 |
| Island Countries | 0 | - | 4.99 | 708,602 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,042,641 |
| Northernmost Countries | 0 | - | 4.99 | 359,067 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,016,265 |
| "Land" Countries | 0 | - | 4.98 | 334,278 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,368,918 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,121 |
| Countries with Megacities | 0 | - | 4.99 | 248,626 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,988 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,461 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,369 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,415 |
| Countries by Official Language | 0 | - | 4.95 | 193,792 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,282 |
| Countries in their Native Language | 0 | - | 4.99 | 197,438 |
| Independence from Whom | 0 | - | 4.99 | 210,400 |
| Subdivisions by Country | 0 | - | 4.86 | 50,171 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,219 |
| Megadiverse Countries | 0 | - | 4.96 | 134,497 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,647 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,056 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,595 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,936 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,085 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,176 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,473 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,503 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,333 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,795 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 76,070 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,555 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,652 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,623 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,827 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,162 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,354 |
| World Map Quiz | 0 | - | 4.81 | 63,939 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,042 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,649 |
| Countries by Founding Story | 0 | - | 4.95 | 76,817 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,949 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,606 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,325 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,538 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,192 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,391 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,572 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,113 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,598 |
| Widest Countries East to West | 0 | - | 4.92 | 129,095 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,308 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,575 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,749 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,920 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,919 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,304 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 76,979 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,657 |
| Countries with Double Letters | 0 | - | 4.96 | 93,822 |
| Countries that End in N | 0 | - | 4.94 | 157,254 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,217 |
| Countries with Six Letters | 0 | - | 4.93 | 210,849 |
| Countries with W | 0 | - | 4.97 | 158,506 |
| Countries with Z | 0 | - | 4.98 | 288,404 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,859 |
| Countries That End in U | 0 | - | 4.95 | 119,666 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,004 |
| Countries that End in O | 0 | - | 4.92 | 158,697 |
| Countries that End in R | 0 | - | 4.87 | 118,415 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,968 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,573 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,637 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,724 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,292 |
| Countries That End in Y | 0 | - | 4.90 | 185,325 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,739 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,999 |
| Countries that End in I | 0 | - | 4.94 | 134,595 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,599 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,360 |
| Countries That End in NIA | 0 | - | 4.92 | 109,225 |
| Countries That End in BIA | 0 | - | 4.93 | 148,459 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,344 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,704 |
| Countries That End in RIA | 0 | - | 4.93 | 126,259 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,252 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,922 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,768 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,127 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,675 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,074 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,357 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,878 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,765 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,944 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,432 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,099 |
| Countries that End in L | 0 | - | 4.94 | 156,208 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,558 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,038 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,679 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,514 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,575 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,186 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,732 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,139 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,756 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,175 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,996 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,852 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,274 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,488 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,474 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,055 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,627 |
| One Border Countries | 0 | - | 4.98 | 466,123 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,811,083 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,601,150 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,230 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,762 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,249 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,036 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,037 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,584 |
| Countries by National Anthem | 0 | - | 4.92 | 71,099 |
| NATO Countries | 0 | - | 4.98 | 277,689 |
| EU Countries Quiz | 0 | - | 4.99 | 271,287 |
| Recently Independent Countries | 0 | - | 4.98 | 158,307 |
| French-Speaking Countries | 0 | - | 4.85 | 269,596 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,471 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,756 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,093 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 269,983 |
| German-Speaking Countries | 0 | - | 4.91 | 140,947 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,975 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,596 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,167 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,825 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 116,990 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,032 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,245 |
