| European Countries by First 2 Letters | 0 | - | 4.95 | 530,966 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,527 |
| States of the German Confederation in 1848 | 0 | - | 4.90 | 32,253 |
| Save Europeans by Guessing Countries | 0 | - | 4.86 | 215,026 |
| States of Germany | 0 | - | 4.95 | 153,564 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,368 |
| Regions of Italy | 0 | - | 4.92 | 76,420 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,515 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,674 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,496 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,771 |
| Regions of France | 0 | - | 4.70 | 121,425 |
| France Immigration by Country | 0 | - | 4.70 | 76,725 |
| Departments of France | 0 | - | 4.93 | 54,620 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,409 |
| Official European Union Languages | 0 | - | 4.97 | 239,101 |
| European Countries in their Native Language | 0 | - | 4.99 | 158,245 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 429,543 |
| Geography of the French Empire | 0 | - | 4.45 | 27,169 |
| The French Revolution | 0 | - | 4.47 | 24,082 |
| France Multiple Choice | 0 | - | 4.39 | 40,783 |
| History of France | 0 | - | 4.61 | 57,354 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,971 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,919 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 649,626 |
| Name that Greek Letter | 0 | - | 4.93 | 324,343 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,155 |
| Famous French People | 0 | - | 4.07 | 35,922 |
| Word Chain - France | 0 | - | 4.38 | 42,867 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,436 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,941 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,458 |
| History of Italy | 0 | - | 4.55 | 32,085 |
| Italy Multiple Choice | 0 | - | 4.74 | 104,063 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,748 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,324 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,447 |
| Celtic Nations | 0 | - | 4.69 | 47,016 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 219,709 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,725 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 311,704 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 173,910 |
| Capitals of French Regions | 0 | - | 4.45 | 16,125 |
| Famous Germans | 0 | - | 4.50 | 55,575 |
| German Groups of Things | 0 | - | 4.46 | 38,555 |
| Germany True or False? | 0 | - | 4.61 | 48,921 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,199 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,913 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,550 |
| Languages of Spain | 0 | - | 4.36 | 23,365 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,365 |
| Counties of England | 0 | - | 4.97 | 799,867 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,515 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 358,855 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 71,742 |
| Top African Languages on a Map | 0 | - | 4.94 | 74,647 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 98,222 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,476 |
| European Geography By Letter - B #2 | 0 | - | 4.86 | 87,507 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,466 |
| Federal Subjects of Russia | 0 | - | 4.95 | 148,300 |
| Movies Set in France | 0 | - | 4.26 | 13,135 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,973 |
| French Inventions | 0 | - | 4.10 | 13,911 |
| History of Paris | 0 | - | 4.24 | 13,665 |
| States of Germany Map Quiz | 0 | - | 4.92 | 133,336 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,244 |
| Counties of England Map Quiz | 0 | - | 4.97 | 308,357 |
| Champions League Winners | 0 | - | 4.92 | 1,010,995 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,633 |
| History of Austria | 0 | - | 4.70 | 17,926 |
| The Vikings! | 0 | - | 4.46 | 28,375 |
| The Portuguese Empire | 0 | - | 4.58 | 12,087 |
| American to British Word Translation | 0 | - | 4.14 | 139,403 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,473 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,545 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,719 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,975 |
| Presidents of France | 0 | - | 4.25 | 24,238 |
| Italian Foods | 0 | - | 4.30 | 73,012 |
| The Mafia Quiz | 0 | - | 4.46 | 23,393 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,642 |
| History of The Netherlands | 0 | - | 4.46 | 17,501 |
| Canary Islands | 0 | - | 4.62 | 17,500 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,866 |
| British Spellings | 0 | - | 4.06 | 99,527 |
| British Groups of Things | 0 | - | 4.25 | 82,932 |
| British Acronyms | 0 | - | 4.40 | 45,872 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,064 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,996 |
| Geography of Scotland | 0 | - | 4.63 | 21,679 |
| England or Wales? | 0 | - | 4.94 | 45,828 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 131,241 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 80,495 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,668 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,680 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,956 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,853 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,694 |
| Slavic Languages | 0 | - | 4.68 | 54,520 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 101,786 |
| France A-Z | 0 | - | 4.16 | 38,283 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,519 |
| Geography of Germany | 0 | - | 4.35 | 17,219 |
| History of Germany | 0 | - | 4.39 | 52,914 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,684 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,535 |
| History of Spain | 0 | - | 4.23 | 21,132 |
| British to American Word Translation | 0 | - | 3.74 | 255,205 |
| British Foods by Description | 0 | - | 3.94 | 48,349 |
| British and American Word Differences | 0 | - | 2.63 | 46,906 |
| British Geography Quiz #2 | 0 | - | 4.29 | 28,084 |
| Bridges of London | 0 | - | 4.17 | 10,127 |
| British Sport Trivia | 0 | - | 4.37 | 20,490 |
| Famous Welsh People | 0 | - | 4.31 | 11,591 |
| Malta Country Quiz | 0 | - | 4.81 | 31,138 |
| History of Russia Quiz | 0 | - | 4.47 | 31,971 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,797 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,285 |
| French Foods | 0 | - | 4.00 | 27,735 |
| Word Chain - Germany | 0 | - | 4.31 | 22,639 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,282 |
| The Trojan War | 0 | - | 4.83 | 39,852 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 112,416 |
| Word Chain - Italy | 0 | - | 4.07 | 23,199 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,136 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 85,058 |
| Roman Emperors | 0 | - | 4.95 | 120,555 |
| Famous Nordic People | 0 | - | 4.34 | 20,199 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,626 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,993 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,369 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,550 |
| People on Money - England | 0 | - | 4.29 | 16,627 |
| Name a Valid English City | 0 | - | 4.19 | 16,766 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,940 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,767 |
| European Geography By Letter - A | 0 | - | 4.52 | 147,107 |
| European Geography By Letter - B #1 | 0 | - | 4.69 | 120,509 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,888 |
| European Geography By Letter - D | 0 | - | 4.50 | 109,442 |
| European Geography By Letter - L | 0 | - | 4.52 | 114,111 |
| European Geography By Letter - M | 0 | - | 4.67 | 131,491 |
| European Geography By Letter - N | 0 | - | 4.44 | 101,287 |
| European Geography By Letter - R | 0 | - | 4.43 | 94,105 |
| European Geography By Letter - V | 0 | - | 4.42 | 93,355 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,945 |
| Europe Map Quiz | 0 | - | 5.00 | 4,774,630 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,394 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 72,047 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,344 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,320 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 100,968 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,855 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,584 |
| Kings of France Quiz | 0 | - | 4.20 | 32,845 |
| The Reign of Napoleon | 0 | - | 4.54 | 39,048 |
| Capitals of German States | 0 | - | 4.74 | 29,006 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,420 |
| Olympian Gods Quiz | 0 | - | 4.96 | 502,277 |
| Ancient Greek Words | 0 | - | 4.93 | 112,045 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,502 |
| Name Every Beatles Song | 0 | - | 4.97 | 237,342 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 292,192 |
| Oceania Map Quiz | 0 | - | 4.98 | 655,939 |
| Australian Capitals | 0 | - | 4.92 | 62,776 |
| European Physical Geography | 0 | - | 4.26 | 33,555 |
| Geography of Russia | 0 | - | 4.57 | 21,560 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 42,038 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,893 |
| Ligue 1 Champions | 0 | - | 4.21 | 48,675 |
| Tour de France Winners | 0 | - | 4.27 | 15,441 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,146 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 438,387 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,327 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,249 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,206 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,393 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,741 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,425 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,981 |
| Geography of the British Empire | 0 | - | 4.48 | 39,775 |
| Champions League Top 4 | 0 | - | 4.77 | 137,590 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,450,108 |
| Asia Map Quiz | 0 | - | 4.99 | 920,792 |
| Japanese Language - Katakana Practice | 0 | - | 4.61 | 33,218 |
| Africa Map Quiz | 0 | - | 5.00 | 2,123,223 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 51,043 |
| Australia Map Quiz | 0 | - | 4.95 | 345,417 |
| United States Map Quiz | 0 | - | 4.98 | 4,164,939 |
| Top 10 Non-English Languages of Los Angeles | 0 | - | 4.43 | 59,985 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 213,027 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,773 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,863 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 365,328 |
| European Geography By Letter - E | 0 | - | 4.23 | 114,350 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,699 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,549 |
| European Geography By Letter - G | 0 | - | 4.27 | 103,234 |
| European Geography By Letter - I | 0 | - | 4.09 | 95,980 |
