| Countries of the World Quiz | 0 | - | 5.00 | 46,889,693 |
| Landlocked Countries | 0 | - | 4.99 | 413,264 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,713,435 |
| Sahara Desert Countries | 0 | - | 4.98 | 160,424 |
| Himalayan Countries | 0 | - | 4.95 | 135,204 |
| Andean Countries | 0 | - | 4.94 | 82,754 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,165 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,106 |
| Coffee Producing Countries | 0 | - | 4.81 | 65,830 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 64,539 |
| Danube Countries | 0 | - | 4.97 | 71,044 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 115,706 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,498 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,392 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,315 |
| European Landlocked Countries | 0 | - | 4.99 | 145,712 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,140 |
| Countries with the Most Species | 0 | - | 4.99 | 95,222 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,284 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,190 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,355 |
| Countries that Use the Peso | 0 | - | 4.87 | 58,938 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.89 | 72,548 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 56,918 |
| Countries in the Alps | 0 | - | 4.87 | 116,764 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,524 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,178 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 77,982 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,385 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,110 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 94,966 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,527 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,723 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,047 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,018 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,182 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,021 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,412 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,712 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,719 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 116,989 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,608 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,235 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 44,731 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 239,067 |
| World Countries - Blind Typing | 0 | - | 5.00 | 105,524 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,573 |
| Largest Countries By Category | 0 | - | 4.97 | 156,691 |
| Countries by Countries | 0 | - | 4.96 | 62,220 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,320 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 61,951 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,315 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,721 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 323,452 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,001 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 401,534 |
| Island Countries | 0 | - | 4.99 | 707,464 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,039,000 |
| Northernmost Countries | 0 | - | 4.99 | 357,523 |
| Countries of South America | 0 | - | 5.00 | 914,095 |
| Countries of Oceania | 0 | - | 5.00 | 1,039,640 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,846,958 |
| "Land" Countries | 0 | - | 4.98 | 333,545 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,361,318 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 170,985 |
| Countries with Megacities | 0 | - | 4.99 | 246,498 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 196,908 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 111,790 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 135,363 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 79,751 |
| Countries by Official Language | 0 | - | 4.95 | 192,696 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,021 |
| Countries in their Native Language | 0 | - | 4.99 | 196,554 |
| Independence from Whom | 0 | - | 4.99 | 209,589 |
| Subdivisions by Country | 0 | - | 4.86 | 50,048 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 130,674 |
| Megadiverse Countries | 0 | - | 4.97 | 133,864 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 129,731 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 54,903 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,404 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,848 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,600 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 61,970 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 92,827 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,114 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,200 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,731 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 75,493 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,395 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,470 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,484 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,644 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,003 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 108,468 |
| World Map Quiz | 0 | - | 4.81 | 63,443 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 152,470 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,281 |
| Countries by Founding Story | 0 | - | 4.95 | 76,488 |
| Countries by Road Signs | 0 | - | 4.98 | 53,062 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,265 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 103,936 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 121,902 |
| Countries With the Most Languages | 0 | - | 4.90 | 199,626 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 109,820 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 93,026 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,234 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 60,919 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,301 |
| Widest Countries East to West | 0 | - | 4.92 | 128,569 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,209 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,160 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,545 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,666 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,586 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,002 |
| Countries by Contribution to UN Budget | 0 | - | 4.86 | 69,045 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,564 |
| Countries with Double Letters | 0 | - | 4.97 | 93,305 |
| Countries that End in N | 0 | - | 4.94 | 156,365 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 258,594 |
| Countries with Six Letters | 0 | - | 4.93 | 210,280 |
| Countries with W | 0 | - | 4.97 | 158,173 |
| Countries with Z | 0 | - | 4.98 | 287,779 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,494 |
| Countries That End in U | 0 | - | 4.95 | 119,487 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,466 |
| Countries that End in O | 0 | - | 4.92 | 158,520 |
| Countries that End in R | 0 | - | 4.87 | 118,244 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,842 |
| Countries Ending in "IA" | 0 | - | 4.99 | 206,945 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,262 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,449 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 140,898 |
| Countries That End in Y | 0 | - | 4.90 | 185,181 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,292 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,617 |
| Countries that End in I | 0 | - | 4.94 | 134,371 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,117 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,175 |
| Countries That End in NIA | 0 | - | 4.92 | 108,967 |
| Countries That End in BIA | 0 | - | 4.92 | 147,670 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,022 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,444 |
| Countries That End in RIA | 0 | - | 4.93 | 126,052 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 109,969 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,113 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,485 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 124,861 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,318 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 73,908 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,083 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,608 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,457 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,800 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,082 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,763 |
| Countries that End in L | 0 | - | 4.94 | 155,688 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 210,973 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,975 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,492 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,265 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,403 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 246,663 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 199,031 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 125,886 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,131 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 223,322 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 151,480 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,593 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.81 | 108,158 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,407 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,289 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,434,404 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 377,451 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,799,558 |
| One Border Countries | 0 | - | 4.98 | 464,082 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,586,034 |
| Countries of the World in Plague Inc. | 0 | - | 4.53 | 29,659 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 85,772 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 265,820 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 120,821 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 111,440 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 92,537 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,204 |
| Majority Muslim Countries | 0 | - | 4.98 | 368,300 |
| Countries by National Anthem | 0 | - | 4.92 | 71,010 |
| NATO Countries | 0 | - | 4.98 | 275,494 |
| EU Countries Quiz | 0 | - | 4.99 | 269,725 |
| Recently Independent Countries | 0 | - | 4.98 | 157,937 |
| French-Speaking Countries | 0 | - | 4.85 | 268,708 |
| Natural Features of Countries #1 | 0 | - | 4.86 | 83,358 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,874 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 284,761 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 268,049 |
| German-Speaking Countries | 0 | - | 4.89 | 123,488 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,270 |
| Countries with Wild Tigers | 0 | - | 4.96 | 135,578 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,285 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,641 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,042 |
