| States of Germany | 0 | - | 4.96 | 150,720 |
| Germany Immigration by Country | 0 | - | 4.85 | 80,231 |
| European Countries by First 2 Letters | 0 | - | 4.95 | 527,125 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,139 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,670 |
| Save Europeans by Guessing Countries | 0 | - | 4.84 | 210,442 |
| Regions of Italy | 0 | - | 4.92 | 75,002 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 44,003 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,842 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,556 |
| Departments of France | 0 | - | 4.93 | 53,094 |
| Famous Germans | 0 | - | 4.50 | 54,757 |
| German Groups of Things | 0 | - | 4.46 | 38,354 |
| Germany True or False? | 0 | - | 4.61 | 48,610 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,410 |
| England or Wales? | 0 | - | 4.94 | 45,429 |
| Count to 10 in Europe: Pro | 0 | - | 4.86 | 68,758 |
| Official European Union Languages | 0 | - | 4.97 | 237,351 |
| European Countries in their Native Language | 0 | - | 4.99 | 157,149 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,989 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 643,532 |
| Name that Greek Letter | 0 | - | 4.94 | 322,166 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,664 |
| Country Quiz on a Map - Germany | 0 | - | 4.95 | 34,622 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,630 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,416 |
| Top African Languages on a Map | 0 | - | 4.92 | 72,941 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,273 |
| Celtic Nations | 0 | - | 4.69 | 46,850 |
| Top 10 Languages Spoken in Europe | 0 | - | 4.96 | 216,978 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 87,001 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 308,864 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 168,910 |
| Regions of France | 0 | - | 4.78 | 119,672 |
| France Immigration by Country | 0 | - | 4.72 | 76,093 |
| Capitals of German States | 0 | - | 4.74 | 28,870 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,161 |
| History of Germany | 0 | - | 4.39 | 52,680 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,625 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,744 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,954 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,107 |
| Counties of England | 0 | - | 4.97 | 791,287 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 102,353 |
| The UK for Americans - True or False | 0 | - | 4.43 | 58,458 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 351,550 |
| Top Asian Languages on a Map | 0 | - | 4.95 | 70,891 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,531 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,437 |
| European Geography By Letter - B #2 | 0 | - | 4.84 | 76,535 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,109 |
| Federal Subjects of Russia | 0 | - | 4.94 | 144,807 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,547 |
| States of Germany Map Quiz | 0 | - | 4.91 | 132,014 |
| Word Chain - Germany | 0 | - | 4.31 | 22,506 |
| UK Cities Map Quiz | 0 | - | 4.95 | 462,867 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 93,212 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,429 |
| Champions League Winners | 0 | - | 4.92 | 999,012 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,239 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,411 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,776 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,779 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,362 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,585 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,801 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 231,237 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,765 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,689 |
| France Cities Map Quiz | 0 | - | 4.96 | 165,510 |
| Word Chain - France | 0 | - | 4.38 | 42,638 |
| Germany Country Quiz | 0 | - | 4.82 | 156,917 |
| Germany Cities Map Quiz | 0 | - | 4.87 | 125,411 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,832 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,810 |
| Italy Country Quiz | 0 | - | 4.82 | 122,501 |
| Regions of Italy Map Quiz | 0 | - | 4.96 | 148,670 |
| Italy Cities Map Quiz | 0 | - | 4.97 | 151,328 |
| Italian Foods | 0 | - | 4.31 | 72,348 |
| The Mafia Quiz | 0 | - | 4.46 | 23,224 |
| History of The Netherlands | 0 | - | 4.46 | 17,348 |
| Spain Cities Map Quiz | 0 | - | 4.87 | 96,281 |
| Regions of Spain Map Quiz | 0 | - | 4.95 | 184,886 |
| Canary Islands | 0 | - | 4.61 | 17,426 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,256 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,297 |
| British Spellings | 0 | - | 4.07 | 99,322 |
| British Groups of Things | 0 | - | 4.25 | 82,739 |
| British Acronyms | 0 | - | 4.39 | 45,669 |
| UK Immigration by Country | 0 | - | 4.94 | 139,957 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,980 |
| United Kingdom Country Quiz | 0 | - | 4.96 | 138,605 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,621 |
| Geography of Scotland | 0 | - | 4.63 | 21,518 |
| All UEFA Champions League Teams Ever | 0 | - | 4.85 | 128,939 |
| Countries with the Most Arabic Speakers | 0 | - | 4.92 | 79,634 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,487 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,614 |
| Word Scramble - European Countries | 0 | - | 4.70 | 141,156 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 113,554 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 65,019 |
| Slavic Languages | 0 | - | 4.68 | 54,090 |
| Countries With the Most Russian Speakers | 0 | - | 4.97 | 99,127 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,581 |
| Andorra Country Quiz | 0 | - | 4.90 | 31,484 |
| Famous Swiss and Austrian People | 0 | - | 4.45 | 14,575 |
| Famous Dutch and Belgian People | 0 | - | 4.56 | 17,986 |
| France A-Z | 0 | - | 4.16 | 38,097 |
| Geography of Germany | 0 | - | 4.35 | 17,119 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,493 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,303 |
| Most Common First Names in Spain | 0 | - | 4.27 | 45,510 |
| Languages of Spain | 0 | - | 4.36 | 23,199 |
| Switzerland A-Z | 0 | - | 4.45 | 25,545 |
| Most Common Surnames in the UK | 0 | - | 4.21 | 69,515 |
| Fictional Characters from Great Britain | 0 | - | 4.24 | 41,950 |
| Wonderwall Lyrics | 0 | - | 4.25 | 73,529 |
| Malta Country Quiz | 0 | - | 4.81 | 30,889 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,953 |
| History of Russia Quiz | 0 | - | 4.49 | 31,824 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,613 |
| Famous French People | 0 | - | 4.12 | 28,087 |
| Movies Set in France | 0 | - | 4.26 | 13,090 |
| French Inventions | 0 | - | 4.08 | 13,871 |
| Country Quiz on a Map - France | 0 | - | 4.98 | 46,743 |
| History of Paris | 0 | - | 4.24 | 13,627 |
| The Trojan War | 0 | - | 4.83 | 39,509 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,940 |
| 101 Figures from Greek Mythology | 0 | - | 4.99 | 124,805 |
| History of Italy | 0 | - | 4.55 | 31,868 |
| Word Chain - Italy | 0 | - | 4.07 | 23,121 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,341 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,057 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,183 |
| Roman Emperors | 0 | - | 4.95 | 118,857 |
| Geography of the Dutch Empire | 0 | - | 4.61 | 34,530 |
| Famous Nordic People | 0 | - | 4.34 | 19,934 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,558 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 77,049 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,266 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,487 |
| People on Money - England | 0 | - | 4.29 | 16,578 |
| Name a Valid English City | 0 | - | 4.19 | 16,657 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,444 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,860 |
| European Geography By Letter - A | 0 | - | 4.61 | 132,590 |
| European Geography By Letter - B #1 | 0 | - | 4.67 | 111,055 |
| European Geography By Letter - C | 0 | - | 4.46 | 112,023 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,902 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,371 |
| European Geography By Letter - M | 0 | - | 4.64 | 129,170 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,968 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,743 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,117 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,490 |
| Europe Map Quiz | 0 | - | 5.00 | 4,740,099 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 71,066 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,708 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 70,021 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 61,058 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,721 |
| Top 10 European Countries by English Proficiency | 0 | - | 4.74 | 65,476 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,463 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,873 |
| Capitals of French Regions | 0 | - | 4.45 | 16,009 |
| Kings of France Quiz | 0 | - | 4.20 | 32,601 |
| German Loan Words | 0 | - | 4.27 | 135,540 |
| Olympian Gods Quiz | 0 | - | 4.96 | 497,581 |
| Ancient Greek Words | 0 | - | 4.93 | 110,951 |
| British to American Food Translation | 0 | - | 3.38 | 51,891 |
| Things British People Know that Americans Don't | 0 | - | 4.25 | 51,326 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,659 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,755 |
| Famous Scottish People | 0 | - | 4.22 | 18,344 |
| Africa Map Quiz | 0 | - | 5.00 | 2,108,069 |
| Oceania Map Quiz | 0 | - | 4.98 | 637,180 |
| Australian Capitals | 0 | - | 4.92 | 62,621 |
| European Physical Geography | 0 | - | 4.26 | 33,406 |
| Geography of Russia | 0 | - | 4.57 | 21,456 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,824 |
| History of Austria | 0 | - | 4.70 | 17,780 |
| Austria Country Quiz | 0 | - | 4.57 | 59,462 |
| Belgium Country Quiz | 0 | - | 4.70 | 71,391 |
| France Country Quiz | 0 | - | 4.70 | 134,165 |
| Biggest French Empire Countries | 0 | - | 4.49 | 64,990 |
| Geography of the French Empire | 0 | - | 4.45 | 26,973 |
| The French Revolution | 0 | - | 4.46 | 23,837 |
| France Multiple Choice | 0 | - | 4.38 | 40,664 |
| Tour de France Winners | 0 | - | 4.27 | 15,264 |
| History of France | 0 | - | 4.59 | 56,424 |
| Bundesliga Champions | 0 | - | 4.24 | 55,909 |
| All Bundesliga Teams Ever | 0 | - | 4.35 | 45,204 |
| German History A-Z | 0 | - | 4.49 | 24,483 |
| German Inventions | 0 | - | 3.91 | 30,197 |
| Embarrassing Chapters in German History | 0 | - | 3.41 | 12,587 |
| Greece Country Quiz | 0 | - | 4.74 | 65,887 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 434,571 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,741 |
| Luxembourg Country Quiz | 0 | - | 4.77 | 33,563 |
| Monaco Country Quiz | 0 | - | 4.47 | 41,315 |
