| European Countries by First 2 Letters | 0 | - | 4.95 | 529,889 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,388 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 32,091 |
| Save Europeans by Guessing Countries | 0 | - | 4.83 | 213,916 |
| States of Germany | 0 | - | 4.95 | 152,795 |
| Germany Immigration by Country | 0 | - | 4.85 | 81,133 |
| Regions of Italy | 0 | - | 4.92 | 76,014 |
| Netherlands Immigration by Country | 0 | - | 4.93 | 52,266 |
| Regions of Spain Quiz | 0 | - | 4.90 | 114,098 |
| Cantons of Switzerland | 0 | - | 4.98 | 51,278 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,715 |
| Regions of France | 0 | - | 4.72 | 120,943 |
| France Immigration by Country | 0 | - | 4.70 | 76,579 |
| Departments of France | 0 | - | 4.93 | 54,240 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 69,207 |
| Official European Union Languages | 0 | - | 4.97 | 238,654 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,954 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 428,473 |
| Geography of the French Empire | 0 | - | 4.45 | 27,111 |
| The French Revolution | 0 | - | 4.47 | 24,010 |
| France Multiple Choice | 0 | - | 4.39 | 40,749 |
| History of France | 0 | - | 4.59 | 57,100 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,802 |
| History of Paris | 0 | - | 4.24 | 13,655 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,024 |
| Famous French People | 0 | - | 4.07 | 35,658 |
| Word Chain - France | 0 | - | 4.38 | 42,795 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 47,262 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,863 |
| French History Multiple Choice | 0 | - | 4.55 | 33,076 |
| History of Italy | 0 | - | 4.55 | 32,007 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,836 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,684 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,258 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,403 |
| Celtic Nations | 0 | - | 4.69 | 46,962 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,430 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 310,797 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 172,227 |
| Capitals of French Regions | 0 | - | 4.45 | 16,088 |
| Famous Germans | 0 | - | 4.50 | 55,340 |
| German Groups of Things | 0 | - | 4.46 | 38,492 |
| Germany True or False? | 0 | - | 4.61 | 48,838 |
| Largest Islands of Greece | 0 | - | 4.59 | 48,062 |
| Famous Italians by Clue | 0 | - | 4.45 | 89,551 |
| Italy True or False? | 0 | - | 4.42 | 47,455 |
| Provinces of the Netherlands | 0 | - | 4.80 | 41,425 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,287 |
| Counties of England | 0 | - | 4.97 | 797,639 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 103,309 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,653 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 356,639 |
| Catholic Countries in Europe | 0 | - | 4.83 | 95,207 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 78,714 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,090 |
| Federal Subjects of Russia | 0 | - | 4.95 | 147,557 |
| Movies Set in France | 0 | - | 4.26 | 13,124 |
| Regions of France Map Quiz | 0 | - | 4.97 | 144,556 |
| French Inventions | 0 | - | 4.08 | 13,900 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,938 |
| Countries and Territories of the United Kingdom | 0 | - | 4.90 | 94,052 |
| Counties of England Map Quiz | 0 | - | 4.97 | 307,831 |
| Champions League Winners | 0 | - | 4.92 | 1,007,751 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,519 |
| History of Austria | 0 | - | 4.70 | 17,875 |
| The Vikings! | 0 | - | 4.46 | 28,354 |
| The Portuguese Empire | 0 | - | 4.58 | 12,073 |
| American to British Word Translation | 0 | - | 4.14 | 139,162 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,920 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 233,494 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,044 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 167,280 |
| Presidents of France | 0 | - | 4.25 | 24,162 |
| Italian Foods | 0 | - | 4.30 | 72,830 |
| The Mafia Quiz | 0 | - | 4.46 | 23,339 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,562 |
| History of The Netherlands | 0 | - | 4.46 | 17,449 |
| Canary Islands | 0 | - | 4.62 | 17,485 |
| Switzerland Immigration by Country | 0 | - | 4.69 | 29,752 |
| British Spellings | 0 | - | 4.06 | 99,468 |
| British Groups of Things | 0 | - | 4.25 | 82,884 |
| British Acronyms | 0 | - | 4.40 | 45,813 |
| United Kingdom Decoder | 0 | - | 4.29 | 40,044 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,865 |
| Geography of Scotland | 0 | - | 4.63 | 21,632 |
| England or Wales? | 0 | - | 4.94 | 45,737 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 130,566 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,617 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.80 | 41,662 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,758 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 115,159 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,525 |
| Slavic Languages | 0 | - | 4.68 | 54,402 |
| France A-Z | 0 | - | 4.16 | 38,220 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.40 | 23,490 |
| Geography of Germany | 0 | - | 4.35 | 17,197 |
| History of Germany | 0 | - | 4.39 | 52,852 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 648,012 |
| Name that Greek Letter | 0 | - | 4.93 | 323,944 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,633 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,488 |
| History of Spain | 0 | - | 4.23 | 21,100 |
| Languages of Spain | 0 | - | 4.36 | 23,332 |
| British to American Word Translation | 0 | - | 3.74 | 255,116 |
| British Foods by Description | 0 | - | 3.94 | 48,332 |
| British and American Word Differences | 0 | - | 2.63 | 46,886 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,602 |
| Bridges of London | 0 | - | 4.17 | 10,113 |
| British Sport Trivia | 0 | - | 4.37 | 20,468 |
| Famous Welsh People | 0 | - | 4.31 | 11,520 |
| Malta Country Quiz | 0 | - | 4.81 | 31,079 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 268,363 |
| Top European Languages on a Map | 0 | - | 4.77 | 132,173 |
| History of Russia Quiz | 0 | - | 4.47 | 31,937 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,752 |
| French Geography Quiz #2 | 0 | - | 4.62 | 23,246 |
| French Foods | 0 | - | 4.00 | 27,705 |
| Word Chain - Germany | 0 | - | 4.31 | 22,595 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 35,086 |
| The Trojan War | 0 | - | 4.83 | 39,755 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 111,976 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 126,166 |
| Word Chain - Italy | 0 | - | 4.07 | 23,170 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,114 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,576 |
| Roman Emperors | 0 | - | 4.95 | 120,174 |
| Famous Nordic People | 0 | - | 4.34 | 20,141 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,615 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,901 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,346 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,536 |
| People on Money - England | 0 | - | 4.29 | 16,618 |
| Name a Valid English City | 0 | - | 4.19 | 16,735 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 279,356 |
| European Geography By Letter - A | 0 | - | 4.52 | 146,432 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 119,761 |
| European Geography By Letter - C | 0 | - | 4.46 | 114,134 |
| European Geography By Letter - D | 0 | - | 4.50 | 108,763 |
| European Geography By Letter - L | 0 | - | 4.52 | 113,627 |
| European Geography By Letter - M | 0 | - | 4.67 | 130,815 |
| European Geography By Letter - P #1 | 0 | - | 4.80 | 97,642 |
| European Geography By Letter - N | 0 | - | 4.44 | 100,942 |
| European Geography By Letter - R | 0 | - | 4.42 | 93,793 |
| European Geography By Letter - V | 0 | - | 4.43 | 93,085 |
| European Geography By Letter - T | 0 | - | 4.41 | 82,536 |
| Europe Map Quiz | 0 | - | 5.00 | 4,765,859 |
| Europe Geography Quiz #1 | 0 | - | 4.55 | 71,308 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,973 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,260 |
| Europe Geography Quiz #5 | 0 | - | 4.55 | 61,256 |
| European Geography By Letter - S #1 | 0 | - | 4.62 | 100,681 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 20,490 |
| Kings of France Quiz | 0 | - | 4.20 | 32,766 |
| The Reign of Napoleon | 0 | - | 4.54 | 38,978 |
| Capitals of German States | 0 | - | 4.74 | 28,971 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,359 |
| Olympian Gods Quiz | 0 | - | 4.96 | 501,243 |
| Ancient Greek Words | 0 | - | 4.93 | 111,723 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,462 |
| Name Every Beatles Song | 0 | - | 4.97 | 236,483 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 291,843 |
| Africa Map Quiz | 0 | - | 5.00 | 2,119,211 |
| Oceania Map Quiz | 0 | - | 4.98 | 642,945 |
| Australian Capitals | 0 | - | 4.92 | 62,734 |
| European Physical Geography | 0 | - | 4.26 | 33,520 |
| Geography of Russia | 0 | - | 4.57 | 21,544 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,983 |
| France World Cup Squad 2018 | 0 | - | 4.41 | 33,747 |
| Ligue 1 Champions | 0 | - | 4.21 | 48,521 |
| Tour de France Winners | 0 | - | 4.27 | 15,386 |
| Embarrassing Chapters in French History | 0 | - | 3.65 | 20,125 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 437,441 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 56,191 |
| Sweden Immigration by Country | 0 | - | 4.55 | 56,159 |
| Sweden True or False? | 0 | - | 4.53 | 40,342 |
| United Kingdom A-Z | 0 | - | 4.52 | 88,075 |
| British Geography Multiple Choice | 0 | - | 4.49 | 43,345 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,683 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,367 |
| Countries the UK Declared War On | 0 | - | 4.55 | 122,559 |
| Geography of the British Empire | 0 | - | 4.48 | 39,707 |
| Champions League Top 4 | 0 | - | 4.77 | 136,741 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,448,761 |
| Asia Map Quiz | 0 | - | 4.99 | 917,659 |
| Countries of Africa | 0 | - | 5.00 | 2,540,027 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 46,923 |
| African East Coast | 0 | - | 4.96 | 96,134 |
| Western Africa Map Quiz | 0 | - | 4.97 | 73,988 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 50,797 |
| Australia Map Quiz | 0 | - | 4.95 | 344,798 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,574 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 212,460 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,685 |
| Top 10 Oldest African Countries | 0 | - | 4.88 | 28,007 |
| Countries That Use the Euro | 0 | - | 4.95 | 105,222 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 364,661 |
| European Geography By Letter - E | 0 | - | 4.23 | 113,870 |
| European Geography By Letter - F | 0 | - | 4.17 | 93,032 |
| European Geography By Letter - H | 0 | - | 4.30 | 96,146 |
| European Geography By Letter - G | 0 | - | 4.27 | 102,822 |
