| European Countries by First 2 Letters | 0 | - | 4.95 | 526,250 |
| Germany Multiple Choice | 0 | - | 4.84 | 54,037 |
| States of Germany | 0 | - | 4.96 | 149,978 |
| Germany Immigration by Country | 0 | - | 4.84 | 79,992 |
| States of the German Confederation in 1848 | 0 | - | 4.89 | 31,513 |
| Regions of Italy | 0 | - | 4.92 | 74,673 |
| Netherlands Immigration by Country | 0 | - | 4.94 | 43,785 |
| Regions of Spain Quiz | 0 | - | 4.90 | 112,283 |
| Cantons of Switzerland | 0 | - | 4.98 | 50,115 |
| 10 Closest Megacities to London | 0 | - | 4.90 | 17,402 |
| Count to 10 in Europe: Pro | 0 | - | 4.85 | 68,568 |
| Official European Union Languages | 0 | - | 4.97 | 236,473 |
| European Countries in their Native Language | 0 | - | 4.99 | 156,675 |
| Europe by Borders in 30 Seconds | 0 | - | 4.98 | 425,087 |
| The Vikings! | 0 | - | 4.45 | 28,244 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,525 |
| Countries that Beat Switzerland | 0 | - | 4.88 | 41,553 |
| History of Italy | 0 | - | 4.55 | 31,809 |
| Italy Multiple Choice | 0 | - | 4.74 | 103,140 |
| Geography of the Dutch Empire | 0 | - | 4.62 | 34,477 |
| Countries of the Spanish Empire | 0 | - | 4.52 | 76,975 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,237 |
| Celtic Nations | 0 | - | 4.69 | 46,807 |
| Most Guessed Cities in Europe - Not Capitals | 0 | - | 4.82 | 86,827 |
| Countries of Europe with an Empty Map | 0 | - | 5.00 | 307,761 |
| All First-Level Subdivisions of Europe on a Map | 0 | - | 4.98 | 167,797 |
| Counties of England | 0 | - | 4.97 | 788,954 |
| "Big Five" European Soccer Champions Since 2000 | 0 | - | 4.97 | 349,708 |
| Regions of France | 0 | - | 4.78 | 119,180 |
| France Immigration by Country | 0 | - | 4.72 | 75,946 |
| Famous Germans | 0 | - | 4.50 | 54,600 |
| German Groups of Things | 0 | - | 4.46 | 38,301 |
| Germany True or False? | 0 | - | 4.61 | 48,524 |
| Largest Islands of Greece | 0 | - | 4.59 | 47,444 |
| Famous Italians by Clue | 0 | - | 4.45 | 88,348 |
| Provinces of the Netherlands | 0 | - | 4.80 | 40,767 |
| 100 Greatest Britons Quiz | 0 | - | 4.41 | 48,039 |
| Foods in a Full English Breakfast | 0 | - | 4.46 | 101,927 |
| European Geography By Letter - P #1 | 0 | - | 4.81 | 96,312 |
| Catholic Countries in Europe | 0 | - | 4.83 | 94,191 |
| Biggest Countries in Europe in 1700 | 0 | - | 4.73 | 58,128 |
| European Geography By Letter - B #2 | 0 | - | 4.83 | 76,201 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,749 |
| Federal Subjects of Russia | 0 | - | 4.94 | 143,912 |
| History of Austria | 0 | - | 4.70 | 17,743 |
| Regions of France Map Quiz | 0 | - | 4.97 | 143,087 |
| Geography of the French Empire | 0 | - | 4.48 | 26,923 |
| The French Revolution | 0 | - | 4.46 | 23,774 |
| France Multiple Choice | 0 | - | 4.38 | 40,630 |
| History of France | 0 | - | 4.59 | 55,990 |
| States of Germany Map Quiz | 0 | - | 4.91 | 131,659 |
| Biggest Cities in Germany in 1910 | 0 | - | 4.41 | 23,382 |
| Sweden Immigration by Country | 0 | - | 4.55 | 55,683 |
| The Portuguese Empire | 0 | - | 4.54 | 11,987 |
| American to British Word Translation | 0 | - | 4.06 | 117,044 |
| Languages of the United Kingdom | 0 | - | 4.13 | 40,700 |
| Countries and Territories of the United Kingdom | 0 | - | 4.89 | 92,886 |
| Counties of England Map Quiz | 0 | - | 4.97 | 306,045 |
| Champions League Winners | 0 | - | 4.92 | 996,008 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,442 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,146 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,109 |
| Departments of France | 0 | - | 4.93 | 52,766 |
| Countries Surrounding Rome | 0 | - | 4.97 | 49,357 |
| England or Wales? | 0 | - | 4.94 | 45,306 |
| All UEFA Champions League Teams Ever | 0 | - | 4.84 | 128,429 |
| Pre-Euro Currencies | 0 | - | 4.44 | 52,441 |
| European Countries with the Fewest Overnight Visitors | 0 | - | 4.78 | 41,597 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,970 |
| Top 20 Football Clubs in Europe | 0 | - | 4.48 | 112,973 |
| Slavic Languages | 0 | - | 4.67 | 53,964 |
| Word Chain - France | 0 | - | 4.38 | 42,575 |
| Capitals of Italian Regions | 0 | - | 4.62 | 36,423 |
| Italian Foods | 0 | - | 4.31 | 72,155 |
| The Mafia Quiz | 0 | - | 4.46 | 23,203 |
| History of The Netherlands | 0 | - | 4.46 | 17,305 |
| Spanish Immigration by Country | 0 | - | 4.63 | 55,241 |
| Canary Islands | 0 | - | 4.61 | 17,397 |
| Switzerland Immigration by Country | 0 | - | 4.70 | 29,133 |
| British Spellings | 0 | - | 4.07 | 99,201 |
| British Groups of Things | 0 | - | 4.25 | 82,667 |
| British Acronyms | 0 | - | 4.39 | 45,615 |
| United Kingdom Decoder | 0 | - | 4.29 | 39,943 |
| Geography of Scotland | 0 | - | 4.63 | 21,474 |
| 100 Longest Rivers in Europe - with a Map | 0 | - | 4.94 | 64,778 |
| French Geography Quiz #1 | 0 | - | 4.89 | 34,507 |
| Geography of Germany | 0 | - | 4.35 | 17,082 |
| History of Germany | 0 | - | 4.39 | 52,612 |
| Letters of the Greek Alphabet | 0 | - | 4.97 | 641,717 |
| Name that Greek Letter | 0 | - | 4.94 | 321,597 |
| History of Spain | 0 | - | 4.29 | 20,998 |
| Languages of Spain | 0 | - | 4.36 | 23,145 |
| British to American Word Translation | 0 | - | 3.74 | 253,293 |
| British Foods by Description | 0 | - | 3.94 | 48,228 |
| British and American Word Differences | 0 | - | 2.67 | 45,909 |
| British Geography Quiz #2 | 0 | - | 4.29 | 27,502 |
| Bridges of London | 0 | - | 4.17 | 10,061 |
| British Sport Trivia | 0 | - | 4.37 | 20,360 |
| Famous Welsh People | 0 | - | 4.21 | 9,770 |
| African Countries by First 2 Letters | 0 | - | 4.96 | 266,478 |
| Top European Languages on a Map | 0 | - | 4.77 | 131,095 |
| History of Russia Quiz | 0 | - | 4.49 | 31,787 |
| Russia Multiple Choice | 0 | - | 4.58 | 40,559 |
| Famous French People | 0 | - | 4.12 | 27,923 |
| Movies Set in France | 0 | - | 4.26 | 13,070 |
| French Inventions | 0 | - | 4.08 | 13,863 |
| History of Paris | 0 | - | 4.24 | 13,612 |
| Word Chain - Germany | 0 | - | 4.31 | 22,474 |
| The Trojan War | 0 | - | 4.83 | 39,422 |
| Greek Mythology General Knowledge #1 | 0 | - | 4.85 | 110,498 |
| Word Chain - Italy | 0 | - | 4.07 | 23,086 |
| Embarrassing Chapters in Italian History | 0 | - | 4.24 | 12,037 |
| Ancient Roman Trivia #1 | 0 | - | 4.85 | 84,032 |
| Roman Emperors | 0 | - | 4.95 | 118,421 |
| Famous Nordic People | 0 | - | 4.34 | 19,847 |
| Greenland... or Iceland? | 0 | - | 4.50 | 43,682 |
| Famous Spaniards Quiz | 0 | - | 4.24 | 11,540 |
| Invasions of Great Britain | 0 | - | 4.51 | 59,379 |
| Word Chain - United Kingdom | 0 | - | 4.05 | 29,237 |
| The British Royal Family - Modern Times | 0 | - | 4.16 | 21,458 |
| People on Money - England | 0 | - | 4.29 | 16,561 |
| Name a Valid English City | 0 | - | 4.19 | 16,627 |
| English Monarchs in Order by First Letter | 0 | - | 4.38 | 31,314 |
| Asian Countries by First 2 Letters | 0 | - | 4.91 | 277,071 |
| Australian Capitals | 0 | - | 4.92 | 62,592 |
| European Geography By Letter - A | 0 | - | 4.56 | 132,369 |
| European Geography By Letter - B #1 | 0 | - | 4.68 | 110,869 |
| European Geography By Letter - C | 0 | - | 4.46 | 111,804 |
| European Geography By Letter - D | 0 | - | 4.50 | 106,677 |
| European Geography By Letter - L | 0 | - | 4.52 | 112,196 |
| European Geography By Letter - M | 0 | - | 4.61 | 128,852 |
| European Geography By Letter - N | 0 | - | 4.44 | 99,651 |
| European Geography By Letter - R | 0 | - | 4.42 | 92,610 |
| European Geography By Letter - V | 0 | - | 4.43 | 92,010 |
| European Geography By Letter - T | 0 | - | 4.41 | 81,280 |
| Europe Map Quiz | 0 | - | 5.00 | 4,730,206 |
| Europe Geography Quiz #1 | 0 | - | 4.54 | 70,979 |
| Europe Geography Quiz #2 | 0 | - | 4.57 | 71,606 |
| Europe Geography Quiz #4 | 0 | - | 4.57 | 69,932 |
| Europe Geography Quiz #5 | 0 | - | 4.54 | 60,970 |
| European Geography By Letter - S #1 | 0 | - | 4.63 | 99,578 |
| Four Letter European Geography #1 | 0 | - | 4.44 | 27,131 |
| Four Letter European Geography #2 | 0 | - | 4.57 | 19,602 |
| Capitals of French Regions | 0 | - | 4.45 | 15,982 |
| Capitals of German States | 0 | - | 4.74 | 28,810 |
| Chancellors of Germany, 1949–present | 0 | - | 4.60 | 23,090 |
| Olympian Gods Quiz | 0 | - | 4.96 | 495,818 |
| Ancient Greek Words | 0 | - | 4.92 | 110,648 |
| Name Every Beatles Song | 0 | - | 4.97 | 234,006 |
| Bohemian Rhapsody Lyrics | 0 | - | 4.98 | 290,291 |
| Africa Map Quiz | 0 | - | 5.00 | 2,103,865 |
| Oceania Map Quiz | 0 | - | 4.98 | 635,106 |
| European Physical Geography | 0 | - | 4.26 | 33,373 |
| Geography of Russia | 0 | - | 4.57 | 21,424 |
| Slovakia... or Slovenia? | 0 | - | 4.69 | 41,765 |
| Roman Numeral Decoding Quiz | 0 | - | 4.94 | 433,425 |
| Two Letter Roman Numerals | 0 | - | 4.97 | 55,608 |
| United Kingdom A-Z | 0 | - | 4.53 | 87,203 |
| The Thirteen Dwarves in the Hobbit | 0 | - | 4.81 | 28,390 |
| Wives of King Henry VIII | 0 | - | 4.55 | 53,167 |
| Countries the UK Declared War On | 0 | - | 4.61 | 121,752 |
| Geography of the British Empire | 0 | - | 4.48 | 39,467 |
| Champions League Top 4 | 0 | - | 4.77 | 133,719 |
| East Asia Map Quiz | 0 | - | 4.99 | 1,439,466 |
| Asia Map Quiz | 0 | - | 4.99 | 906,744 |
| Countries of Africa | 0 | - | 5.00 | 2,506,853 |
| Landlocked Countries in Africa | 0 | - | 4.99 | 45,785 |
| African East Coast | 0 | - | 4.96 | 95,013 |
| Western Africa Map Quiz | 0 | - | 4.97 | 72,899 |
| Oceanian Capitals - Map Quiz | 0 | - | 4.95 | 49,772 |
| Australia Map Quiz | 0 | - | 4.94 | 342,420 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,241 |
| Mediterranean Countries Quiz | 0 | - | 4.99 | 210,057 |
| Countries with Territorial Claims in Antarctica | 0 | - | 4.94 | 92,186 |
| Countries That Use the Euro | 0 | - | 4.96 | 102,915 |
| Europe Cities Map Quiz | 0 | - | 4.99 | 362,247 |
| European Geography By Letter - E | 0 | - | 4.23 | 112,185 |
| European Geography By Letter - F | 0 | - | 4.17 | 91,463 |
| European Geography By Letter - H | 0 | - | 4.30 | 94,876 |
| European Geography By Letter - G | 0 | - | 4.25 | 101,250 |
| European Geography By Letter - I | 0 | - | 4.10 | 94,467 |
| European Geography By Letter - K | 0 | - | 4.14 | 69,141 |
| European Geography By Letter - O | 0 | - | 4.28 | 61,905 |
| European Geography by Letter - W | 0 | - | 4.20 | 82,286 |
| Europe Geography Quiz #3 | 0 | - | 4.34 | 63,387 |
| European Geography By Letter - S #2 | 0 | - | 4.19 | 50,496 |
| 10 Easternmost Countries in Europe | 0 | - | 4.89 | 113,485 |
| European Geography A-Z | 0 | - | 4.28 | 48,987 |
| Country Codes of Europe | 0 | - | 3.46 | 13,651 |
| The Only European Country ... | 0 | - | 4.91 | 213,735 |
| European Countries NOT in NATO | 0 | - | 4.87 | 59,471 |
| Austria... or Australia? | 0 | - | 4.68 | 103,848 |
| Presidents of France | 0 | - | 4.25 | 23,892 |
| French Foods | 0 | - | 4.00 | 27,585 |
| Ancient Greek Trivia | 0 | - | 4.62 | 66,763 |
| Geography of Ancient Greece | 0 | - | 4.69 | 31,765 |
| Figures from Greek Mythology | 0 | - | 4.91 | 184,875 |
| Italian Inventions | 0 | - | 3.81 | 18,408 |
| Countries Italy Declared War On | 0 | - | 4.75 | 42,932 |
| Kings of Spain Quiz | 0 | - | 4.14 | 13,954 |
