| Countries of Europe Quiz | 0 | - | 5.00 | 3,775,857 |
| Countries of South America | 0 | - | 5.00 | 926,749 |
| Countries of Oceania | 0 | - | 5.00 | 1,056,158 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,876,006 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 86,859 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,099 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.92 | 93,684 |
| Five Most Elevated Countries by Continent | 0 | - | 4.98 | 113,048 |
| Five Countries With the Most Tourists by Continent | 0 | - | 4.95 | 121,769 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,551,865 |
| Landlocked Countries | 0 | - | 4.99 | 421,569 |
| Sahara Desert Countries | 0 | - | 4.98 | 164,247 |
| Himalayan Countries | 0 | - | 4.95 | 138,542 |
| Andean Countries | 0 | - | 4.93 | 84,507 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,692 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 125,686 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,323 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,726 |
| Danube Countries | 0 | - | 4.97 | 71,957 |
| Countries With an "Ish" Demonym | 0 | - | 4.98 | 116,957 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,377 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,216 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 149,687 |
| European Landlocked Countries | 0 | - | 4.99 | 147,084 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,554 |
| Countries with the Most Species | 0 | - | 4.99 | 103,193 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,689 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,558 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,700 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,509 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,191 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,613 |
| Countries in the Alps | 0 | - | 4.87 | 118,143 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 100,829 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,967 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,617 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,557 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,447 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,918 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,623 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,455 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,154 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,807 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,628 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,492 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,181 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,431 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,482 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,799 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,275 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 63,065 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,995 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 243,732 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,980 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,186 |
| Largest Countries By Category | 0 | - | 4.97 | 158,139 |
| Countries by Countries | 0 | - | 4.96 | 63,148 |
| Five Least Guessed Countries by Continent | 0 | - | 4.97 | 98,594 |
| Country Flags with the Most White | 0 | - | 4.85 | 138,632 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,267 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,554 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,638 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,025,041 |
| Five Top Olympic Medal-Winning Countries by Continent | 0 | - | 4.96 | 144,538 |
| Countries with Most Nobel Prizes by Continent | 0 | - | 4.93 | 59,977 |
| Five Coldest Countries by Continent | 0 | - | 4.97 | 76,671 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 331,245 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 375,398 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 406,962 |
| Island Countries | 0 | - | 4.99 | 710,900 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,049,366 |
| Northernmost Countries | 0 | - | 4.99 | 361,778 |
| "Land" Countries | 0 | - | 4.98 | 337,224 |
| Five Most Inland Capital Cities by Continent | 0 | - | 4.92 | 13,288 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,382,692 |
| Five Most Guessed Countries by Continent | 0 | - | 4.97 | 173,371 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 195,423 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,787 |
| Countries with Megacities | 0 | - | 4.99 | 264,326 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 199,646 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,414 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,909 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,481 |
| Countries by Official Language | 0 | - | 4.95 | 195,176 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 296,259 |
| Countries in their Native Language | 0 | - | 4.99 | 198,971 |
| Independence from Whom | 0 | - | 4.99 | 211,989 |
| Subdivisions by Country | 0 | - | 4.86 | 50,413 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 132,656 |
| Megadiverse Countries | 0 | - | 4.96 | 134,977 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,011 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,331 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 126,193 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,091 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,064 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,573 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,406 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,004 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,624 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,126 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,608 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,851 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,179 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,943 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,332 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,470 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,068 |
| World Map Quiz | 0 | - | 4.81 | 65,034 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 157,069 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,313 |
| Countries by Founding Story | 0 | - | 4.95 | 77,333 |
| Countries by Road Signs | 0 | - | 4.98 | 53,979 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,007 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,237 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,955 |
| Countries With the Most Languages | 0 | - | 4.90 | 202,096 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,844 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,977 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,265 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,416 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,543 |
| Widest Countries East to West | 0 | - | 4.92 | 129,610 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,439 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 186,336 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,106 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,740 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,550 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,823 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,360 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,791 |
| Countries with Double Letters | 0 | - | 4.96 | 96,132 |
| Countries that End in N | 0 | - | 4.95 | 171,017 |
| Countries with Five Letters | 0 | - | 4.96 | 282,239 |
| Countries with Six Letters | 0 | - | 4.94 | 213,443 |
| Countries with W | 0 | - | 4.97 | 160,254 |
| Countries with Z | 0 | - | 4.98 | 291,324 |
| Countries with Letters Missing | 0 | - | 4.96 | 186,613 |
| Countries That End in U | 0 | - | 4.95 | 120,804 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 134,375 |
| Countries that End in O | 0 | - | 4.92 | 159,481 |
| Countries that End in R | 0 | - | 4.87 | 118,943 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,701 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,991 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,630 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,427 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,348 |
| Countries That End in Y | 0 | - | 4.91 | 185,848 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,835 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,802 |
| Countries that End in I | 0 | - | 4.94 | 135,060 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,012 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,787 |
| Countries That End in NIA | 0 | - | 4.92 | 109,742 |
| Countries That End in BIA | 0 | - | 4.93 | 149,153 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,054 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,382 |
| Countries That End in RIA | 0 | - | 4.93 | 126,774 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,974 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 227,482 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,639 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,035 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,600 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,548 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,984 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,431 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,481 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,392 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,235 |
| Countries Containing Two or More Words | 0 | - | 4.97 | 53,927 |
| Countries that End in L | 0 | - | 4.94 | 156,791 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 215,514 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,248 |
| City to Country Quiz #1 | 0 | - | 4.97 | 155,994 |
| City to Country Quiz #3 | 0 | - | 4.88 | 118,917 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 78,961 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 249,671 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,594 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 142,940 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 163,490 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,376 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 152,828 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,077 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,693 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 62,847 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,447,537 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 380,825 |
| One Border Countries | 0 | - | 4.98 | 469,649 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 115,611 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,833,270 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,630,120 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,082 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,520 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,185 |
| Countries by National Anthem | 0 | - | 4.93 | 71,282 |
| NATO Countries | 0 | - | 4.98 | 281,282 |
| EU Countries Quiz | 0 | - | 4.99 | 275,215 |
| Recently Independent Countries | 0 | - | 4.98 | 159,423 |
| French-Speaking Countries | 0 | - | 4.85 | 270,771 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,881 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,402 |
