| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,614,964 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,332,895 |
| Landlocked Countries | 0 | - | 4.99 | 418,918 |
| Save Humanity by Guessing Countries | 0 | - | 4.98 | 567,966 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,756,776 |
| Sahara Desert Countries | 0 | - | 4.98 | 162,988 |
| Himalayan Countries | 0 | - | 4.94 | 137,419 |
| Andean Countries | 0 | - | 4.95 | 83,934 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,229 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,651 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,831 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,349 |
| Danube Countries | 0 | - | 4.97 | 71,662 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,549 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,057 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,651 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,730 |
| European Landlocked Countries | 0 | - | 4.99 | 146,778 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,138 |
| Countries with the Most Species | 0 | - | 4.99 | 102,907 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,263 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,432 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,587 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,302 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,991 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,361 |
| Countries in the Alps | 0 | - | 4.87 | 117,684 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,132 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,362 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,419 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,979 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,091 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,557 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,284 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,185 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,969 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,550 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,477 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,337 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,924 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,187 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,205 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,182 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,061 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,571 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,529 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,365 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,228 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,998 |
| Largest Countries By Category | 0 | - | 4.97 | 157,635 |
| Countries by Countries | 0 | - | 4.96 | 62,836 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,209 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,160 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,466 |
| All Countries by Population With a Map | 0 | - | 4.98 | 108,519 |
| Six Degrees of Separation - Countries #1 | 0 | - | 4.96 | 98,651 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,321 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 328,979 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,601 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,091 |
| Island Countries | 0 | - | 4.99 | 709,745 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,027 |
| Northernmost Countries | 0 | - | 4.99 | 360,458 |
| Countries of South America | 0 | - | 5.00 | 922,890 |
| Countries of Oceania | 0 | - | 5.00 | 1,050,950 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,866,294 |
| "Land" Countries | 0 | - | 4.98 | 335,788 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,375,652 |
| Modern-Day Countries of the Umayyad Caliphate on a Map | 0 | - | 4.98 | 68,622 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,017 |
| Countries with Megacities | 0 | - | 4.99 | 259,803 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,888 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,990 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,168 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,998 |
| Countries by Official Language | 0 | - | 4.95 | 194,641 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,526 |
| Countries in their Native Language | 0 | - | 4.99 | 198,183 |
| Independence from Whom | 0 | - | 4.99 | 211,308 |
| Subdivisions by Country | 0 | - | 4.86 | 50,287 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,698 |
| Megadiverse Countries | 0 | - | 4.96 | 134,765 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,540 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,183 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,754 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,018 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,710 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,380 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,973 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,844 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,487 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,988 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 76,962 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,714 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,994 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,774 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,150 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,326 |
| Countries in Southeast Asia With an Empty Map | 0 | - | 4.97 | 101,326 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 110,190 |
| World Map Quiz | 0 | - | 4.81 | 64,518 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 137,302 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 155,591 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,030 |
| Countries within the Arctic Circle - Map Quiz | 0 | - | 4.85 | 63,753 |
| Countries by Sports in 60 Seconds | 0 | - | 4.91 | 144,521 |
| Countries by Founding Story | 0 | - | 4.95 | 77,061 |
| Countries by Road Signs | 0 | - | 4.98 | 53,651 |
| Countries That Do Not Border | 0 | - | 4.99 | 60,081 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,501 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,927 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,636 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,319 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,519 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,671 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,826 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,260 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,284 |
| Widest Countries East to West | 0 | - | 4.92 | 129,374 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,382 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,958 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,991 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,509 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,221 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,545 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,232 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,725 |
| Countries With the Tallest People | 0 | - | 4.93 | 94,800 |
| Countries with Double Letters | 0 | - | 4.97 | 95,087 |
| Countries that End in N | 0 | - | 4.95 | 169,990 |
| Countries with Five Letters | 0 | - | 4.96 | 280,205 |
| Countries with Six Letters | 0 | - | 4.94 | 212,483 |
| Countries with W | 0 | - | 4.97 | 159,519 |
| Countries with Z | 0 | - | 4.98 | 289,797 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,743 |
| Countries That End in U | 0 | - | 4.95 | 120,412 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,753 |
| Countries that End in O | 0 | - | 4.92 | 159,192 |
| Countries that End in R | 0 | - | 4.87 | 118,734 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,511 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,329 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,105 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,079 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,661 |
| Countries That End in Y | 0 | - | 4.90 | 185,647 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,224 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,419 |
| Countries that End in I | 0 | - | 4.94 | 134,867 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,076 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,578 |
| Countries That End in NIA | 0 | - | 4.92 | 109,515 |
| Countries That End in BIA | 0 | - | 4.93 | 148,842 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,714 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,057 |
| Countries That End in RIA | 0 | - | 4.93 | 126,536 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,624 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,700 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,228 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,584 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,110 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,322 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,685 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,242 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,122 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,193 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,826 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,532 |
| Countries that End in L | 0 | - | 4.94 | 156,541 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 214,009 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,153 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,836 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,724 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,783 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 248,779 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,166 |
| Five Least Populated Countries by Continent | 0 | - | 4.96 | 142,620 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,126 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 224,615 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,584 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 70,955 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,599 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,666 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 382,317 |
| Smallest Countries with at Least Two Borders | 0 | - | 4.97 | 42,474 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,443,236 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 379,730 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,822,555 |
| One Border Countries | 0 | - | 4.98 | 467,678 |
| Every Country in its Official/Native Language | 0 | - | 4.98 | 25,285 |
| Countries with the Highest Minimum Elevation | 0 | - | 4.86 | 16,133 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 278,917 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.95 | 86,552 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 267,424 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 121,682 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,268 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,370 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 58,931 |
| 100 Biggest Cities on a World Map | 0 | - | 4.99 | 416,508 |
| Majority Muslim Countries | 0 | - | 4.98 | 373,243 |
| Countries by National Anthem | 0 | - | 4.93 | 71,183 |
