| City to Country Quiz #1 | 0 | - | 4.96 | 155,713 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,565 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,619 |
| Landlocked Countries | 0 | - | 4.99 | 416,717 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,168,345 |
| Historical City to Country | 0 | - | 4.84 | 78,329 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,962 |
| Himalayan Countries | 0 | - | 4.95 | 136,527 |
| Andean Countries | 0 | - | 4.95 | 83,504 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,764 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,027 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,434 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,032 |
| Danube Countries | 0 | - | 4.97 | 71,439 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,221 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,852 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,168 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,144 |
| European Landlocked Countries | 0 | - | 4.99 | 146,137 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,775 |
| Countries with the Most Species | 0 | - | 4.99 | 101,726 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,907 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,335 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,513 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,162 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,811 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,194 |
| Countries in the Alps | 0 | - | 4.86 | 117,338 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,911 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,915 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,255 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,747 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,831 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,256 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,996 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,996 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,809 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,332 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,371 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,205 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,730 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,004 |
| Countries with the Most Grassland | 0 | - | 4.93 | 77,010 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,727 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,897 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,433 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,254 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,044 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,579 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,834 |
| Largest Countries By Category | 0 | - | 4.97 | 157,266 |
| Countries by Countries | 0 | - | 4.96 | 62,596 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,882 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,082 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,409 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,088 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,740,972 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,901 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,845 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,828 |
| Island Countries | 0 | - | 4.99 | 708,838 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,043,419 |
| Northernmost Countries | 0 | - | 4.99 | 359,407 |
| Countries of South America | 0 | - | 5.00 | 919,760 |
| Countries of Oceania | 0 | - | 5.00 | 1,046,796 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,858,945 |
| "Land" Countries | 0 | - | 4.98 | 334,624 |
| City to Country Quiz #2 | 0 | - | 4.78 | 108,248 |
| City to Country Quiz #4 | 0 | - | 4.53 | 84,027 |
| City to Country Quiz #5 | 0 | - | 4.75 | 80,887 |
| City to Country Quiz #6 | 0 | - | 4.56 | 65,384 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,370,597 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,300 |
| Countries with Megacities | 0 | - | 4.99 | 248,986 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,150 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,556 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,501 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,517 |
| Countries by Official Language | 0 | - | 4.95 | 194,022 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,595 |
| Countries in their Native Language | 0 | - | 4.99 | 197,642 |
| Independence from Whom | 0 | - | 4.99 | 210,823 |
| Subdivisions by Country | 0 | - | 4.86 | 50,202 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,338 |
| Megadiverse Countries | 0 | - | 4.96 | 134,545 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,844 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,077 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,633 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,948 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,452 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,222 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,603 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,551 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,373 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,807 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,193 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,582 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,688 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,646 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,861 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,204 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,585 |
| World Map Quiz | 0 | - | 4.81 | 64,101 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,400 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,704 |
| Countries by Founding Story | 0 | - | 4.95 | 76,880 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,069 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,673 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,401 |
| Countries With the Most Languages | 0 | - | 4.90 | 200,723 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,272 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,469 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,632 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,151 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,642 |
| Widest Countries East to West | 0 | - | 4.92 | 129,140 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,330 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,661 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,923 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,960 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,984 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,363 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,103 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,678 |
| Countries with Double Letters | 0 | - | 4.96 | 94,149 |
| Countries that End in N | 0 | - | 4.95 | 165,986 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,596 |
| Countries with Six Letters | 0 | - | 4.93 | 211,149 |
| Countries with W | 0 | - | 4.97 | 158,821 |
| Countries with Z | 0 | - | 4.98 | 288,784 |
| Countries with Letters Missing | 0 | - | 4.97 | 185,042 |
| Countries That End in U | 0 | - | 4.95 | 119,923 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,166 |
| Countries that End in O | 0 | - | 4.92 | 158,867 |
| Countries that End in R | 0 | - | 4.87 | 118,510 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,290 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,758 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,745 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,814 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,382 |
| Countries That End in Y | 0 | - | 4.90 | 185,428 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,836 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,090 |
| Countries that End in I | 0 | - | 4.94 | 134,668 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,697 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,414 |
| Countries That End in NIA | 0 | - | 4.92 | 109,295 |
| Countries That End in BIA | 0 | - | 4.93 | 148,567 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,429 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,773 |
| Countries That End in RIA | 0 | - | 4.93 | 126,348 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,333 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,089 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,872 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,206 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,787 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,143 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,439 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,945 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,841 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,000 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,525 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,206 |
| Countries that End in L | 0 | - | 4.94 | 156,290 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,899 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,069 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,326 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,809 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,331 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,822 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,253 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,051 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,870 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,296 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,524 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,520 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,440,028 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,870 |
| One Border Countries | 0 | - | 4.98 | 466,429 |
| 48 Asian Countries, 48 Cities | 0 | - | 4.52 | 22,960 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,813,798 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,604,515 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,276 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,915 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,333 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,090 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,091 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,636 |
| Countries by National Anthem | 0 | - | 4.92 | 71,119 |
| NATO Countries | 0 | - | 4.98 | 278,134 |
| EU Countries Quiz | 0 | - | 4.99 | 271,657 |
| Recently Independent Countries | 0 | - | 4.98 | 158,387 |
| French-Speaking Countries | 0 | - | 4.85 | 269,759 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,546 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,949 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,408 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,429 |
| German-Speaking Countries | 0 | - | 4.91 | 143,778 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,035 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,653 |
