| Countries of the World Quiz | 0 | - | 5.00 | 47,128,743 |
| Landlocked Countries | 0 | - | 4.99 | 416,210 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,737,553 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,714 |
| Himalayan Countries | 0 | - | 4.95 | 136,320 |
| Andean Countries | 0 | - | 4.95 | 83,383 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,644 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,874 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,342 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,947 |
| Danube Countries | 0 | - | 4.97 | 71,350 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,142 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,810 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,068 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,016 |
| European Landlocked Countries | 0 | - | 4.99 | 146,075 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,687 |
| Countries with the Most Species | 0 | - | 4.99 | 99,529 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,838 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,310 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,484 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,125 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,778 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,148 |
| Countries in the Alps | 0 | - | 4.86 | 117,277 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,862 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,793 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,224 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,685 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,718 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,216 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,932 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,965 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,763 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,295 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,336 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,187 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,685 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,957 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,966 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,627 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,864 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,398 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,149 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,747 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,461 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,789 |
| Largest Countries By Category | 0 | - | 4.97 | 157,199 |
| Countries by Countries | 0 | - | 4.96 | 62,554 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,815 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,066 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,401 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,043 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 326,490 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 373,631 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 403,439 |
| Island Countries | 0 | - | 4.99 | 708,666 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,042,822 |
| Northernmost Countries | 0 | - | 4.99 | 359,139 |
| Countries of South America | 0 | - | 5.00 | 919,071 |
| Countries of Oceania | 0 | - | 5.00 | 1,045,904 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,857,223 |
| "Land" Countries | 0 | - | 4.98 | 334,313 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,369,365 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,157 |
| Countries with Megacities | 0 | - | 4.99 | 248,697 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,022 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,478 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,391 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,428 |
| Countries by Official Language | 0 | - | 4.95 | 193,873 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 294,344 |
| Countries in their Native Language | 0 | - | 4.99 | 197,513 |
| Independence from Whom | 0 | - | 4.99 | 210,434 |
| Subdivisions by Country | 0 | - | 4.86 | 50,176 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,250 |
| Megadiverse Countries | 0 | - | 4.96 | 134,510 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,708 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,060 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 125,610 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,939 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,363 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,183 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,500 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,514 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,347 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,797 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 76,101 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,560 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,659 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,628 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,831 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,181 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,407 |
| World Map Quiz | 0 | - | 4.81 | 63,984 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 154,140 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,660 |
| Countries by Founding Story | 0 | - | 4.95 | 76,825 |
| Countries by Road Signs | 0 | - | 4.98 | 53,364 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,981 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,619 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,341 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,586 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,221 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,409 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,589 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,125 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,608 |
| Widest Countries East to West | 0 | - | 4.92 | 129,104 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,318 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,596 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,873 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,924 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,941 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,318 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,011 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,659 |
| Countries with Double Letters | 0 | - | 4.96 | 93,840 |
| Countries that End in N | 0 | - | 4.94 | 157,276 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,243 |
| Countries with Six Letters | 0 | - | 4.93 | 210,865 |
| Countries with W | 0 | - | 4.97 | 158,530 |
| Countries with Z | 0 | - | 4.98 | 288,428 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,869 |
| Countries That End in U | 0 | - | 4.95 | 119,670 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,034 |
| Countries that End in O | 0 | - | 4.92 | 158,709 |
| Countries that End in R | 0 | - | 4.87 | 118,421 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,975 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,598 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,651 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,737 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,305 |
| Countries That End in Y | 0 | - | 4.90 | 185,331 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,752 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,011 |
| Countries that End in I | 0 | - | 4.94 | 134,605 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,613 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,370 |
| Countries That End in NIA | 0 | - | 4.92 | 109,237 |
| Countries That End in BIA | 0 | - | 4.93 | 148,472 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,359 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,714 |
| Countries That End in RIA | 0 | - | 4.93 | 126,278 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,267 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,965 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,792 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,147 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,697 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,091 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,371 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,888 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,782 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,952 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,455 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 53,113 |
| Countries that End in L | 0 | - | 4.94 | 156,217 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,651 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,040 |
| City to Country Quiz #1 | 0 | - | 4.96 | 155,691 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,526 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,589 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,223 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,752 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,205 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,776 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,187 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,012 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,857 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,278 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,497 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,484 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,439,285 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 378,676 |
| One Border Countries | 0 | - | 4.98 | 466,200 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,811,684 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,602,006 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,244 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 266,804 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,268 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,052 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,050 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,599 |
| Countries by National Anthem | 0 | - | 4.92 | 71,102 |
| NATO Countries | 0 | - | 4.98 | 277,799 |
| EU Countries Quiz | 0 | - | 4.99 | 271,376 |
| Recently Independent Countries | 0 | - | 4.98 | 158,320 |
| French-Speaking Countries | 0 | - | 4.85 | 269,646 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,475 |
| Countries That Use the Euro | 0 | - | 4.95 | 103,802 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 286,150 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 270,116 |
| German-Speaking Countries | 0 | - | 4.91 | 141,895 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,985 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,605 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,219 |
| Top Five Countries by Religion | 0 | - | 4.93 | 169,873 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,030 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.91 | 112,039 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 111,256 |
