| City to Country Quiz #1 | 0 | - | 4.97 | 155,940 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,870 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,909 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,114 |
| Historical City to Country | 0 | - | 4.84 | 78,571 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,495,173 |
| Landlocked Countries | 0 | - | 4.99 | 420,936 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,770,669 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,964 |
| Himalayan Countries | 0 | - | 4.95 | 138,273 |
| Andean Countries | 0 | - | 4.95 | 84,353 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,578 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,481 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,198 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,614 |
| Danube Countries | 0 | - | 4.97 | 71,886 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,859 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,282 |
| Countries with the Worst Passports | 0 | - | 4.94 | 84,077 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,540 |
| European Landlocked Countries | 0 | - | 4.99 | 147,019 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,449 |
| Countries with the Most Species | 0 | - | 4.99 | 103,135 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,588 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,530 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,672 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,465 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,146 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,548 |
| Countries in the Alps | 0 | - | 4.87 | 118,026 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,206 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,810 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,571 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,498 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,368 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,866 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,530 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,389 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,105 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,733 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,581 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,439 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,109 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,378 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,407 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,647 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,206 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,718 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,871 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,404 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,798 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,138 |
| Largest Countries By Category | 0 | - | 4.97 | 158,001 |
| Countries by Countries | 0 | - | 4.96 | 63,071 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,526 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,233 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,528 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,557 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 330,659 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,182 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,534 |
| Island Countries | 0 | - | 4.99 | 710,597 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,048,467 |
| Northernmost Countries | 0 | - | 4.99 | 361,456 |
| Countries of South America | 0 | - | 5.00 | 925,704 |
| Countries of Oceania | 0 | - | 5.00 | 1,054,865 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,873,411 |
| "Land" Countries | 0 | - | 4.98 | 336,944 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,380,885 |
| City to Country Quiz #2 | 0 | - | 4.78 | 108,432 |
| City to Country Quiz #4 | 0 | - | 4.56 | 84,166 |
| City to Country Quiz #5 | 0 | - | 4.74 | 81,052 |
| City to Country Quiz #6 | 0 | - | 4.56 | 65,508 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,607 |
| Countries with Megacities | 0 | - | 4.99 | 263,788 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,455 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,317 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,721 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,362 |
| Countries by Official Language | 0 | - | 4.95 | 195,023 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,082 |
| Countries in their Native Language | 0 | - | 4.99 | 198,531 |
| Independence from Whom | 0 | - | 4.99 | 211,827 |
| Subdivisions by Country | 0 | - | 4.86 | 50,381 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,395 |
| Megadiverse Countries | 0 | - | 4.96 | 134,919 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,887 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,285 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,866 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,072 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,975 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,514 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,301 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,965 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,590 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,048 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,446 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,812 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,126 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,903 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,281 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,434 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,848 |
| World Map Quiz | 0 | - | 4.81 | 64,936 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 156,639 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,237 |
| Countries by Founding Story | 0 | - | 4.95 | 77,265 |
| Countries by Road Signs | 0 | - | 4.98 | 53,873 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,874 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,147 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,872 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,905 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,781 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,912 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,209 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,385 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,486 |
| Widest Countries East to West | 0 | - | 4.92 | 129,555 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,424 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,239 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,078 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,675 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,460 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,745 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,330 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,775 |
| Countries with Double Letters | 0 | - | 4.97 | 95,883 |
| Countries that End in N | 0 | - | 4.95 | 170,804 |
| Countries with Five Letters | 0 | - | 4.96 | 281,903 |
| Countries with Six Letters | 0 | - | 4.94 | 213,229 |
| Countries with W | 0 | - | 4.97 | 160,082 |
| Countries with Z | 0 | - | 4.98 | 291,079 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,438 |
| Countries That End in U | 0 | - | 4.95 | 120,709 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,210 |
| Countries that End in O | 0 | - | 4.92 | 159,413 |
| Countries that End in R | 0 | - | 4.87 | 118,883 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,653 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,819 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,498 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,346 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,157 |
| Countries That End in Y | 0 | - | 4.91 | 185,797 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,696 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,705 |
| Countries that End in I | 0 | - | 4.94 | 135,018 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,868 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,740 |
| Countries That End in NIA | 0 | - | 4.92 | 109,684 |
| Countries That End in BIA | 0 | - | 4.93 | 149,072 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,965 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,290 |
| Countries That End in RIA | 0 | - | 4.93 | 126,722 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,879 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,276 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,512 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,919 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,490 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,495 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,900 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,405 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,396 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,346 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,130 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,823 |
| Countries that End in L | 0 | - | 4.94 | 156,730 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,085 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,228 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,524 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,489 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,876 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,402 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,138 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,767 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,037 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,659 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,789 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,446,417 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,499 |
| One Border Countries | 0 | - | 4.98 | 468,870 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,830,535 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,626,185 |
| 48 Asian Countries, 48 Cities | 0 | - | 4.52 | 23,006 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,768 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,929 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,978 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,439 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,594 |
| Countries by National Anthem | 0 | - | 4.93 | 71,257 |
| NATO Countries | 0 | - | 4.98 | 280,715 |
| EU Countries Quiz | 0 | - | 4.99 | 274,589 |
| Recently Independent Countries | 0 | - | 4.98 | 159,319 |
| French-Speaking Countries | 0 | - | 4.85 | 270,616 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,853 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,180 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 288,650 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 273,546 |
| German-Speaking Countries | 0 | - | 4.91 | 145,620 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,862 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,205 |
