| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,454,550 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,287,700 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 100,782 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 139,449 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 59,515 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,668,783 |
| Landlocked Countries Quiz | 0 | - | 4.99 | 390,776 |
| Countries of the World Quiz | 0 | - | 5.00 | 44,940,814 |
| Countries of the World in 1900 | 0 | - | 4.88 | 77,860 |
| Countries of the World in 1914 with a Map | 0 | - | 4.99 | 185,838 |
| All Countries by Northernmost Point on Land | 0 | - | 4.90 | 119,893 |
| 20 Countries on an Empty Map #1 | 0 | - | 4.95 | 59,484 |
| Countries of the World in 1945 with a Map | 0 | - | 5.00 | 142,073 |
| Sahara Desert Countries | 0 | - | 4.97 | 149,595 |
| Himalayan Countries | 0 | - | 4.94 | 125,746 |
| Andean Countries | 0 | - | 4.93 | 70,770 |
| Countries with the Youngest Median Age | 0 | - | 4.98 | 58,271 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 115,824 |
| Coffee Producing Countries | 0 | - | 4.83 | 61,634 |
| Countries with Shrinking Populations | 0 | - | 4.93 | 60,727 |
| Danube Countries | 0 | - | 4.97 | 61,791 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 98,169 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 82,799 |
| Countries with the Worst Passports | 0 | - | 4.92 | 75,620 |
| Countries with the Most Immigrants | 0 | - | 4.89 | 141,252 |
| European Landlocked Countries | 0 | - | 4.99 | 142,186 |
| Partially Recognized Countries | 0 | - | 4.98 | 100,025 |
| Countries with the Most Species | 0 | - | 4.99 | 93,219 |
| Countries 197 to 205 | 0 | - | 4.88 | 64,950 |
| Tropic of Cancer Countries | 0 | - | 4.95 | 47,125 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 46,201 |
| Countries that Use the Peso | 0 | - | 4.89 | 57,094 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.88 | 70,613 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 54,542 |
| Countries in the Alps | 0 | - | 4.86 | 112,130 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 91,685 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 99,660 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 76,108 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 89,383 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 111,818 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.90 | 92,704 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 96,246 |
| Five Biggest Countries by Longitude | 0 | - | 4.90 | 50,563 |
| Biggest Country by Body of Water | 0 | - | 4.95 | 48,534 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 59,589 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 51,771 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 39,571 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 100,896 |
| Arctic Ocean Countries | 0 | - | 4.94 | 76,546 |
| Countries with the Most Grassland | 0 | - | 4.93 | 74,391 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 111,139 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 65,518 |
| Countries that Host the Most Refugees | 0 | - | 4.94 | 57,425 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.94 | 40,718 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 226,721 |
| World Countries - Blind Typing | 0 | - | 5.00 | 97,823 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 45,762 |
| Largest Countries By Category | 0 | - | 4.97 | 152,627 |
| Countries by Countries | 0 | - | 4.96 | 59,293 |
| Country Flags with the Most White | 0 | - | 4.85 | 133,372 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 60,980 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.86 | 46,566 |
| All Countries by Population With a Map | 0 | - | 4.98 | 97,661 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 94,013 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 84,923 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,530,659 |
| Pixelated World Map | 0 | - | 5.00 | 137,811 |
| Countries of Europe in 1444 | 0 | - | 4.92 | 95,081 |
| Countries of the World in 1444 | 0 | - | 4.98 | 56,986 |
| Modern-Day Countries of the Inca Empire on a Map | 0 | - | 4.83 | 54,334 |
| Countries of the World with a Borderless Map | 0 | - | 4.99 | 77,870 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 363,181 |
| Countries with the Most Tourists Quiz | 0 | - | 4.91 | 386,977 |
| Island Countries Quiz | 0 | - | 4.99 | 695,663 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,006,938 |
| Northernmost Countries | 0 | - | 4.99 | 345,193 |
| Countries of South America | 0 | - | 5.00 | 875,470 |
| Countries of Oceania | 0 | - | 5.00 | 991,387 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,758,191 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 162,789 |
| Countries with Megacities | 0 | - | 4.99 | 222,395 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 189,636 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.97 | 107,718 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 128,955 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 75,128 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 302,401 |
| Global Cities on a World Map | 0 | - | 4.94 | 105,394 |
| Countries by Official Language | 0 | - | 4.95 | 186,173 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.90 | 284,816 |
| Countries in their Native Language | 0 | - | 4.99 | 190,516 |
| Independence from Whom | 0 | - | 4.99 | 202,672 |
| Subdivisions by Country | 0 | - | 4.85 | 48,971 |
| Who Controlled These Colonies? | 0 | - | 4.90 | 125,768 |
| Megadiverse Countries | 0 | - | 4.97 | 131,308 |
| Countries With the Most English Speakers | 0 | - | 4.89 | 124,134 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 53,413 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 122,736 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 73,541 |
| Most Desired Destinations for Potential Migrants | 0 | - | 4.86 | 49,592 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 156,962 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 60,282 |
| Countries of the World in 1938 Quiz | 0 | - | 4.96 | 88,753 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.94 | 150,191 |
| Countries with Multiple Populous Islands | 0 | - | 4.91 | 81,091 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 43,645 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 69,745 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 105,332 |
| Countries Furthest from the United States | 0 | - | 4.93 | 86,524 |
| Countries with the Highest HDI | 0 | - | 4.95 | 135,007 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 72,736 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 69,219 |
| Mediterranean Countries with an Empty Map | 0 | - | 4.99 | 102,030 |
| World Map Quiz | 0 | - | 4.87 | 59,168 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 87,837 |
| Countries by Founding Story | 0 | - | 4.95 | 73,926 |
| Countries by Road Signs | 0 | - | 4.98 | 50,477 |
| Southernmost Countries of the World | 0 | - | 4.99 | 220,438 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 100,023 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 117,848 |
| Countries With the Most Languages | 0 | - | 4.89 | 192,073 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.94 | 97,823 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.89 | 89,661 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 94,849 |
| Countries with the Most Domestic Camels | 0 | - | 4.93 | 59,034 |
| Tallest Countries North to South | 0 | - | 4.84 | 116,656 |
| Widest Countries East to West | 0 | - | 4.92 | 125,790 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 70,444 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 181,630 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 96,006 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.96 | 91,194 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 126,319 |
| Countries with the Most Desert | 0 | - | 4.93 | 124,163 |
| Countries by Contribution to UN Budget | 0 | - | 4.85 | 68,300 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 33,838 |
| Countries with Double Letters | 0 | - | 4.97 | 86,068 |
| Countries that End in N | 0 | - | 4.94 | 149,561 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 250,082 |
| Countries with Six Letters Quiz | 0 | - | 4.94 | 203,663 |
| Countries with W | 0 | - | 4.97 | 152,698 |
| Countries with Z | 0 | - | 4.98 | 279,656 |
| Countries with Letters Missing | 0 | - | 4.97 | 179,243 |
| Countries That End in U | 0 | - | 4.95 | 116,253 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 103,266 |
| Countries that End in O | 0 | - | 4.92 | 155,838 |
| Countries that End in R | 0 | - | 4.84 | 100,886 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 152,776 |
| Countries Ending in "IA" | 0 | - | 4.99 | 200,680 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 165,485 |
| Countries by Last Two Letters | 0 | - | 4.88 | 131,641 |
| Countries by First and Last Letter #2 | 0 | - | 4.95 | 137,537 |
| Countries That End in Y | 0 | - | 4.91 | 182,949 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 191,769 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 147,914 |
| Countries that End in I | 0 | - | 4.92 | 118,151 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 176,944 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 93,146 |
| Countries That End in NIA | 0 | - | 4.92 | 106,801 |
| Countries That End in BIA | 0 | - | 4.92 | 144,813 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 162,484 |
| Countries Whose Names Start with Saint | 0 | - | 4.86 | 115,856 |
| Countries That End in RIA | 0 | - | 4.92 | 122,978 |
| Most Common Words in Official Country Names | 0 | - | 4.85 | 107,131 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 218,189 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 128,753 |
| Divided Country Name Puzzle #3 | 0 | - | 4.91 | 120,715 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 4.99 | 86,617 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 72,041 |
| Countries With One Word and Three A's | 0 | - | 4.94 | 49,636 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 99,282 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.97 | 121,234 |
| Countries that are Free from U.S.A. | 0 | - | 4.87 | 47,064 |
| Countries with the Word "And" | 0 | - | 4.98 | 91,215 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 49,241 |
| Countries that End in L | 0 | - | 4.94 | 153,064 |
| "Land" Countries | 0 | - | 4.98 | 301,371 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 199,098 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 84,274 |
| City to Country Quiz #1 | 0 | - | 4.96 | 151,470 |
| City to Country Quiz #3 | 0 | - | 4.87 | 105,521 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 76,257 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 222,148 |
| Five Poorest Countries by Continent | 0 | - | 4.94 | 194,445 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 123,321 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 158,393 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.93 | 218,187 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 148,430 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.88 | 69,349 |
| Top 15 Countries that Produce the Most Tea | 0 | - | 4.83 | 106,384 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.94 | 85,238 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 60,334 |
| ALL First-Level Subdivisions of the World With a Map | 0 | - | 5.00 | 134,524 |
| All First-Level Subdivisions of Europe by Proximity | 0 | - | 4.85 | 73,241 |
| Top World Languages on a Map | 0 | - | 4.92 | 99,172 |
| Official Languages of the World on the Disappearing World Map | 0 | - | 4.98 | 109,903 |
| 407 Islands on the World Map | 0 | - | 4.99 | 32,581 |
| Historic Journeys on a World Map | 0 | - | 4.99 | 44,172 |
| Biggest Countries by Population | 0 | - | 4.99 | 1,393,966 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 367,432 |
| One Border Countries | 0 | - | 4.98 | 448,497 |
| Countries of Europe in 1000 with a Map | 0 | - | 4.74 | 40,697 |
