| City to Country Quiz #1 | 0 | - | 4.97 | 155,787 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,661 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,711 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,811 |
| Historical City to Country | 0 | - | 4.83 | 78,391 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,266,864 |
| Landlocked Countries | 0 | - | 4.99 | 417,995 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,750,682 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,524 |
| Himalayan Countries | 0 | - | 4.94 | 137,014 |
| Andean Countries | 0 | - | 4.95 | 83,728 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,974 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,341 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,649 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,222 |
| Danube Countries | 0 | - | 4.97 | 71,560 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,407 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,974 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,474 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,525 |
| European Landlocked Countries | 0 | - | 4.99 | 146,663 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,993 |
| Countries with the Most Species | 0 | - | 4.99 | 102,709 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,127 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,388 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,554 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,246 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,913 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,295 |
| Countries in the Alps | 0 | - | 4.87 | 117,539 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,035 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,186 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,354 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,885 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,989 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,380 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,157 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,108 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,912 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,471 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,431 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,290 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,850 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,115 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,140 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,991 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,992 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,516 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,400 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 241,815 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,988 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,925 |
| Largest Countries By Category | 0 | - | 4.97 | 157,490 |
| Countries by Countries | 0 | - | 4.96 | 62,752 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,069 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,129 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,450 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,236 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,121 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,345 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 404,606 |
| Island Countries | 0 | - | 4.99 | 709,354 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,044,986 |
| Northernmost Countries | 0 | - | 4.99 | 360,050 |
| Countries of South America | 0 | - | 5.00 | 921,718 |
| Countries of Oceania | 0 | - | 5.00 | 1,049,516 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,863,445 |
| "Land" Countries | 0 | - | 4.98 | 335,561 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,373,596 |
| City to Country Quiz #2 | 0 | - | 4.78 | 108,303 |
| City to Country Quiz #4 | 0 | - | 4.53 | 84,067 |
| City to Country Quiz #5 | 0 | - | 4.74 | 80,937 |
| City to Country Quiz #6 | 0 | - | 4.56 | 65,428 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 172,693 |
| Countries with Megacities | 0 | - | 4.99 | 249,803 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,526 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,793 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,860 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,781 |
| Countries by Official Language | 0 | - | 4.95 | 194,459 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,285 |
| Countries in their Native Language | 0 | - | 4.99 | 198,017 |
| Independence from Whom | 0 | - | 4.99 | 211,132 |
| Subdivisions by Country | 0 | - | 4.86 | 50,252 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,567 |
| Megadiverse Countries | 0 | - | 4.96 | 134,700 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,153 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,146 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,702 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,989 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,605 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,315 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,834 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,748 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,448 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,929 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,648 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,661 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,889 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,727 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,061 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,280 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,936 |
| World Map Quiz | 0 | - | 4.81 | 64,378 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,109 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,931 |
| Countries by Founding Story | 0 | - | 4.95 | 76,989 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,314 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,826 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,547 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,072 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,432 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,602 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,748 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,214 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,212 |
| Widest Countries East to West | 0 | - | 4.92 | 129,279 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,367 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,839 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,969 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,447 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,122 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,468 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,195 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,707 |
| Countries with Double Letters | 0 | - | 4.97 | 94,896 |
| Countries that End in N | 0 | - | 4.95 | 169,483 |
| Countries with Five Letters | 0 | - | 4.96 | 278,427 |
| Countries with Six Letters | 0 | - | 4.94 | 212,245 |
| Countries with W | 0 | - | 4.97 | 159,375 |
| Countries with Z | 0 | - | 4.98 | 289,587 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,584 |
| Countries That End in U | 0 | - | 4.95 | 120,338 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,590 |
| Countries that End in O | 0 | - | 4.92 | 159,137 |
| Countries that End in R | 0 | - | 4.87 | 118,676 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,465 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,168 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,001 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,998 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,587 |
| Countries That End in Y | 0 | - | 4.90 | 185,599 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,092 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,309 |
| Countries that End in I | 0 | - | 4.94 | 134,814 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,935 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,528 |
| Countries That End in NIA | 0 | - | 4.92 | 109,447 |
| Countries That End in BIA | 0 | - | 4.93 | 148,751 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,615 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,966 |
| Countries That End in RIA | 0 | - | 4.93 | 126,458 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,550 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,465 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,099 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,436 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,008 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,263 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,593 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,144 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,036 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,147 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,728 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,416 |
| Countries that End in L | 0 | - | 4.94 | 156,468 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 213,625 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,137 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,577 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,014 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,522 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 162,987 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,463 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,483 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,912 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.80 | 108,338 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,571 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,599 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,441,974 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,380 |
| One Border Countries | 0 | - | 4.98 | 467,199 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,819,131 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,610,836 |
| 48 Asian Countries, 48 Cities | 0 | - | 4.52 | 22,974 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,435 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,192 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,545 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,193 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,250 |
| Countries by National Anthem | 0 | - | 4.93 | 71,160 |
| NATO Countries | 0 | - | 4.98 | 278,852 |
| EU Countries Quiz | 0 | - | 4.99 | 272,455 |
| Recently Independent Countries | 0 | - | 4.98 | 158,896 |
| French-Speaking Countries | 0 | - | 4.85 | 270,053 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,727 |
| Countries That Use the Euro | 0 | - | 4.95 | 104,320 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,071 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 271,341 |
| German-Speaking Countries | 0 | - | 4.91 | 145,095 |
| Countries with Wild Tigers | 0 | - | 4.96 | 136,165 |
| Countries with Wild Penguins | 0 | - | 4.94 | 99,752 |
