| Countries of Europe Quiz | 0 | - | 5.00 | 3,749,819 |
| Countries of South America | 0 | - | 5.00 | 921,520 |
| Countries of Oceania | 0 | - | 5.00 | 1,049,306 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,863,053 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,257,341 |
| Landlocked Countries | 0 | - | 4.99 | 417,874 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,471 |
| Himalayan Countries | 0 | - | 4.94 | 136,970 |
| Andean Countries | 0 | - | 4.95 | 83,714 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,957 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,307 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,632 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,203 |
| Danube Countries | 0 | - | 4.97 | 71,548 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,385 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,959 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,447 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,501 |
| European Landlocked Countries | 0 | - | 4.99 | 146,519 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,972 |
| Countries with the Most Species | 0 | - | 4.99 | 102,677 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,104 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,383 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,553 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,239 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,902 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,287 |
| Countries in the Alps | 0 | - | 4.86 | 117,525 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,025 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,161 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,347 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,868 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,971 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,373 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,139 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,097 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,901 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,460 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,427 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,282 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,841 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,107 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,125 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,977 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,986 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,510 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,389 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,763 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,948 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,917 |
| Largest Countries By Category | 0 | - | 4.97 | 157,469 |
| Countries by Countries | 0 | - | 4.96 | 62,741 |
| Country Flags with the Most White | 0 | - | 4.87 | 138,055 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,125 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,448 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,220 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,019,261 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,037 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,305 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,549 |
| Island Countries | 0 | - | 4.99 | 709,319 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,860 |
| Northernmost Countries | 0 | - | 4.99 | 359,993 |
| "Land" Countries | 0 | - | 4.98 | 335,511 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,373,338 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,663 |
| Countries with Megacities | 0 | - | 4.99 | 249,738 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,506 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,777 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,833 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,753 |
| Countries by Official Language | 0 | - | 4.95 | 194,437 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,259 |
| Countries in their Native Language | 0 | - | 4.99 | 198,003 |
| Independence from Whom | 0 | - | 4.99 | 211,103 |
| Subdivisions by Country | 0 | - | 4.86 | 50,249 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,548 |
| Megadiverse Countries | 0 | - | 4.96 | 134,690 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,130 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,142 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,695 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,986 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,586 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,308 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,808 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,733 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,444 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,897 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,628 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,653 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,837 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,724 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,017 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,277 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,907 |
| World Map Quiz | 0 | - | 4.81 | 64,335 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,045 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,909 |
| Countries by Founding Story | 0 | - | 4.95 | 76,981 |
| Countries by Road Signs | 0 | - | 4.98 | 53,553 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,295 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,812 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,535 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,045 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,414 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,589 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,741 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,209 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,200 |
| Widest Countries East to West | 0 | - | 4.92 | 129,262 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,358 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,821 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,965 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,437 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,107 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,459 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,186 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,706 |
| Countries with Double Letters | 0 | - | 4.97 | 94,854 |
| Countries that End in N | 0 | - | 4.95 | 169,393 |
| Countries with Five Letters | 0 | - | 4.96 | 277,815 |
| Countries with Six Letters | 0 | - | 4.94 | 212,202 |
| Countries with W | 0 | - | 4.97 | 159,338 |
| Countries with Z | 0 | - | 4.98 | 289,543 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,545 |
| Countries That End in U | 0 | - | 4.95 | 120,321 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,561 |
| Countries that End in O | 0 | - | 4.92 | 159,126 |
| Countries that End in R | 0 | - | 4.87 | 118,669 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,453 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,126 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,987 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,985 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,579 |
| Countries That End in Y | 0 | - | 4.90 | 185,587 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,076 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,296 |
| Countries that End in I | 0 | - | 4.94 | 134,807 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,921 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,516 |
| Countries That End in NIA | 0 | - | 4.92 | 109,438 |
| Countries That End in BIA | 0 | - | 4.93 | 148,738 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,601 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,953 |
| Countries That End in RIA | 0 | - | 4.93 | 126,446 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,540 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,424 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,077 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,416 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,996 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,260 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,586 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,129 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,030 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,140 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,714 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,401 |
| Countries that End in L | 0 | - | 4.94 | 156,463 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,575 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,135 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,785 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,655 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,703 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,550 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,991 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,505 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,967 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,438 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,371 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,904 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,331 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,567 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,592 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,441,787 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,348 |
| One Border Countries | 0 | - | 4.98 | 467,137 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,818,694 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,610,186 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,423 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,162 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,530 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,182 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,234 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,800 |
| Countries by National Anthem | 0 | - | 4.92 | 71,158 |
| NATO Countries | 0 | - | 4.98 | 278,795 |
| EU Countries Quiz | 0 | - | 4.99 | 272,391 |
| Recently Independent Countries | 0 | - | 4.98 | 158,773 |
| French-Speaking Countries | 0 | - | 4.85 | 270,041 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,717 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,298 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,007 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,272 |
| German-Speaking Countries | 0 | - | 4.91 | 145,028 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,154 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,741 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,782 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,472 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,524 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,245 |
