| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,595,978 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 713,638 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,771 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,648 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,523 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 68,236 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,508 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,043,636 |
| Landlocked Countries | 0 | - | 4.99 | 415,190 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,091,528 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 447,405 |
| Countries with Four Letters | 0 | - | 4.99 | 419,435 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,729,456 |
| Sahara Desert Countries | 0 | - | 4.98 | 161,226 |
| Himalayan Countries | 0 | - | 4.95 | 135,917 |
| Andean Countries | 0 | - | 4.94 | 83,141 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 62,463 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 123,586 |
| Coffee Producing Countries | 0 | - | 4.82 | 66,166 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 64,814 |
| Danube Countries | 0 | - | 4.97 | 71,248 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 115,979 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 85,697 |
| Countries with the Worst Passports | 0 | - | 4.94 | 82,835 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 147,762 |
| European Landlocked Countries | 0 | - | 4.99 | 145,947 |
| Partially Recognized Countries | 0 | - | 4.98 | 105,490 |
| Countries with the Most Species | 0 | - | 4.99 | 95,332 |
| Countries 197 to 205 | 0 | - | 4.89 | 69,619 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,265 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,436 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,636 |
| Countries that Use the Peso | 0 | - | 4.88 | 59,059 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,736 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 72,709 |
| Countries with a AAA Credit Rating | 0 | - | 4.85 | 57,063 |
| Countries in the Alps | 0 | - | 4.86 | 117,104 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 94,738 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 105,563 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,150 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 95,569 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 115,365 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.91 | 95,130 |
| Country Chain | 0 | - | 4.96 | 216,059 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 99,774 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 52,886 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,674 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,198 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,267 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,135 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,602 |
| Arctic Ocean Countries | 0 | - | 4.95 | 78,867 |
| Countries with the Most Grassland | 0 | - | 4.93 | 76,879 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 117,424 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 67,786 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,347 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,003 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 240,182 |
| World Countries - Blind Typing | 0 | - | 5.00 | 106,149 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 47,716 |
| Largest Countries By Category | 0 | - | 4.97 | 157,000 |
| Countries by Emojis | 0 | - | 4.99 | 237,221 |
| Countries by Countries | 0 | - | 4.96 | 62,426 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,282 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,768 |
| Country Flags with the Most White | 0 | - | 4.87 | 137,636 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,019 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,375 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 87,919 |
| Islands by Country #1 | 0 | - | 4.87 | 174,648 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,042 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,387 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,414 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 214,417 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 277,808 |
| Name a Valid Country #3 | 0 | - | 4.99 | 260,321 |
| Name a Valid Country #1 | 0 | - | 4.99 | 284,744 |
| Name a Valid Country #2 | 0 | - | 4.98 | 247,057 |
| Name a Valid Country #4 | 0 | - | 4.97 | 252,427 |
| Name a Valid Country #5 | 0 | - | 4.99 | 190,328 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,845 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 325,680 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 372,720 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 402,683 |
| Island Countries | 0 | - | 4.99 | 708,264 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,041,507 |
| Northernmost Countries | 0 | - | 4.99 | 358,615 |
| Countries of South America | 0 | - | 5.00 | 917,551 |
| Countries of Oceania | 0 | - | 5.00 | 1,043,801 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,853,766 |
| "Land" Countries | 0 | - | 4.98 | 334,065 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,678 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,577 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,491 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,437 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 88,984 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,366,593 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,982 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,789 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 234,100 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 223,275 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,760 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,757 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 137,707 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 102,707 |
| Random Countries by Borders | 0 | - | 4.99 | 81,816 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,613 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 171,860 |
| Countries with Megacities | 0 | - | 4.99 | 248,089 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 197,738 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 112,322 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 136,127 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 80,271 |
| Countries by Official Language | 0 | - | 4.95 | 193,137 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 293,644 |
| Countries in their Native Language | 0 | - | 4.99 | 196,973 |
| Independence from Whom | 0 | - | 4.99 | 210,107 |
| Subdivisions by Country | 0 | - | 4.86 | 50,138 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,033 |
| Megadiverse Countries | 0 | - | 4.97 | 134,316 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 130,131 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,004 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,531 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 74,900 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 161,861 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,112 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 93,308 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,411 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,291 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,781 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 75,887 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,506 |
| Countries Furthest from the United States | 0 | - | 4.94 | 88,610 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,576 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 74,789 |
| Most Dispersed Island Nations | 0 | - | 4.96 | 71,116 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 109,076 |
| World Map Quiz | 0 | - | 4.81 | 63,767 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 153,559 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 106,564 |
| Southernmost Countries of the World | 0 | - | 4.99 | 226,752 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,497 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,223 |
| Countries With the Most Languages | 0 | - | 4.89 | 200,263 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,094 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,297 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,484 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,070 |
| Tallest Countries North to South | 0 | - | 4.83 | 119,514 |
| Widest Countries East to West | 0 | - | 4.92 | 129,011 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,281 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,467 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,642 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 93,855 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 147,813 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,213 |
| Countries by Contribution to UN Budget | 0 | - | 4.89 | 76,516 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.84 | 34,639 |
| Countries with Double Letters | 0 | - | 4.96 | 93,663 |
| Countries that End in N | 0 | - | 4.94 | 157,128 |
| Countries with Five Letters Quiz | 0 | - | 4.96 | 259,014 |
| Countries with Six Letters | 0 | - | 4.93 | 210,670 |
| Countries with W | 0 | - | 4.97 | 158,412 |
| Countries with Z | 0 | - | 4.98 | 288,220 |
| Countries with Letters Missing | 0 | - | 4.97 | 184,747 |
| Countries That End in U | 0 | - | 4.95 | 119,604 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 132,855 |
| Countries that End in O | 0 | - | 4.92 | 158,649 |
| Countries that End in R | 0 | - | 4.87 | 118,371 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 154,930 |
| Countries Ending in "IA" | 0 | - | 4.99 | 207,394 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 169,536 |
| Countries by Last Two Letters | 0 | - | 4.85 | 134,640 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,192 |
| Countries That End in Y | 0 | - | 4.90 | 185,282 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 196,606 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 151,888 |
| Countries that End in I | 0 | - | 4.94 | 134,537 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 182,453 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,295 |
| Countries That End in NIA | 0 | - | 4.92 | 109,114 |
| Countries That End in BIA | 0 | - | 4.92 | 147,845 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,245 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 118,630 |
| Countries That End in RIA | 0 | - | 4.93 | 126,193 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,175 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 225,690 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 132,673 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,023 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 90,573 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,022 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,277 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 102,789 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 124,674 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 48,891 |
| Countries with the Word "And" | 0 | - | 4.99 | 116,335 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 52,981 |
| Countries that End in L | 0 | - | 4.94 | 156,149 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 212,081 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,019 |
