| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.72 | 1,650,819 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,322,192 |
| Deutschland | 35 | 31 | 4.64 | 1,012,060 |
| Länder | 48 | 47 | 4.61 | 850,591 |
| Fußball-Quizzes | 22 | 14 | 4.36 | 822,622 |
| Quizz français de Gassu | 17 | 14 | 4.61 | 671,775 |
| Gassu's SVG Quizzes | 44 | 9 | 4.66 | 562,867 |
| Geschichts-Quizzes | 50 | 48 | 4.49 | 505,599 |
| Flaggen-Quizzes | 11 | 11 | 4.74 | 410,486 |
| Antworten sind europäische Länder | 17 | 16 | 4.77 | 403,105 |
| The Only ... | 5 | 3 | 4.65 | 278,770 |
| Politik-Quizzes | 15 | 13 | 4.53 | 269,339 |
| die deutsche Sprache | 15 | 11 | 4.30 | 250,410 |
| Geographie nach Buchstabe | 25 | 25 | 4.37 | 232,763 |
| Bilder nach Buchstabe | 25 | 25 | 3.79 | 231,006 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.76 | 227,522 |
| Sport-Quizzes | 11 | 10 | 4.39 | 210,320 |
| Allerlei | Sonstiges | 13 | 13 | 4.48 | 205,806 |
| Which City in ... | 3 | 3 | 4.47 | 177,172 |
| Die größten Städte | 15 | 13 | 4.41 | 176,808 |
| United States Politics | 18 | 1 | 4.39 | 173,289 |
| Gewässer und Inseln | 15 | 15 | 4.50 | 164,577 |
| Pruebas de Gassu en español | 7 | 7 | 4.37 | 156,447 |
| Sprachen | 13 | 12 | 4.50 | 152,594 |
| Countries by Picture | 13 | 6 | 4.29 | 150,959 |
| Bild-Quizzes | 23 | 20 | 4.21 | 144,456 |
| Name a Valid Answer | 3 | 3 | 4.58 | 144,053 |
| Antworten sind Städte | 16 | 14 | 4.30 | 141,306 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 140,736 |
| Religion | Mythologie | 12 | 12 | 4.35 | 127,067 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.65 | 117,759 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 101,636 |
| Länder Trivia | 14 | 14 | 4.43 | 99,821 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.33 | 95,721 |
| Mathematik-Quizzes | 2 | 2 | 4.41 | 91,327 |
| Regionen, Provinzen etc. | 11 | 10 | 4.64 | 90,362 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 87,763 |
| Österreich | 6 | 6 | 4.73 | 77,276 |
| Wikipedia Quizzes | 5 | 2 | 4.27 | 74,747 |
| Tourismus-Quizzes | 4 | 4 | 4.61 | 73,985 |
| Achtung Abflug! | 3 | 3 | 4.76 | 66,406 |
| City Quizzes | 53 | 2 | 4.60 | 64,884 |
| Zusammengefügt! | 6 | 6 | 4.58 | 64,450 |
| United States Cities | 34 | 2 | 4.67 | 63,968 |
| 100 Longest Rivers by Continent | 7 | 1 | 4.92 | 61,653 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.70 | 57,403 |
| Tier-Quizzes | 7 | 6 | 4.17 | 57,392 |
| A-Z Quizzes | 15 | 1 | 4.58 | 56,705 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.61 | 55,952 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 55,807 |
| Polska | 2 | 1 | 4.87 | 54,935 |
| Geographie A-Z | 7 | 7 | 4.42 | 48,318 |
| United States Geography | 23 | 2 | 4.36 | 46,767 |
| Gassu's Flag Quizzes | 3 | 1 | 4.62 | 39,498 |
| Antworten sind asiatische Länder | 4 | 4 | 4.60 | 37,985 |
| Personen nach Land | 5 | 5 | 4.53 | 36,614 |
| Gruppen von Dingen | 4 | 2 | 4.46 | 35,391 |
| Gassu's Sports Quizzes | 30 | 1 | 4.19 | 34,553 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 34,002 |
| Gemeinden der Schweiz | 27 | 0 | 4.77 | 23,605 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.56 | 23,565 |
| Monarchie | Royals | 3 | 2 | 4.59 | 21,659 |
| World's 50 Largest Cities | 26 | 0 | 4.58 | 20,624 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.47 | 17,290 |
| California | 5 | 1 | 4.34 | 15,724 |
| italiano | 2 | 1 | 4.79 | 15,347 |
| It's All About Countries | 38 | 0 | 4.86 | 13,819 |
| Five Cities by Continent by Letter | 26 | 0 | 3.50 | 12,970 |
| Städte-Trivia | 8 | 5 | 4.51 | 10,440 |
| Misc | 26 | 0 | 4.48 | 7,835 |
| Communes de Suisse | 7 | 0 | 4.92 | 7,770 |
| Religion | 5 | 0 | 3.04 | 7,330 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 7,266 |
| Switzerland | 19 | 0 | 4.81 | 7,088 |
| Historical Quizzes | 19 | 0 | 4.54 | 6,223 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 6,077 |
| Language Quizzes | 12 | 0 | 4.89 | 5,896 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.20 | 5,854 |
| Groups of Things | 6 | 0 | 3.96 | 5,742 |
| World Politics | 13 | 0 | 4.27 | 5,252 |
| Transportation | 12 | 0 | - | 3,705 |
| Auckland Quizzes | 7 | 0 | 4.85 | 3,654 |
| Largest European Cities by Letter | 23 | 0 | - | 3,203 |
| the Britons and their Commonwealth | 5 | 0 | 5.00 | 3,011 |
| Italy | 5 | 0 | 4.83 | 2,869 |
| Donald J. Trump | 5 | 0 | 3.75 | 2,678 |
| All 100k+ Urban Areas | 2 | 0 | 4.92 | 2,665 |
| Germany | 10 | 0 | 4.57 | 2,662 |
| Answers are U.S. States | 11 | 0 | 3.97 | 2,634 |
| Five Biggest Cities by Region | 6 | 0 | - | 2,619 |
| 100 Questions about … | 6 | 0 | - | 2,517 |
| Decoder Quizzes | 7 | 0 | - | 2,425 |
| All 500k+ Urban Areas | 2 | 0 | 4.72 | 2,289 |
| Gassu Quizzes | 7 | 0 | 4.44 | 2,192 |
| US State General Knowledge | 11 | 0 | - | 2,023 |
| Oceania Quizzes | 5 | 0 | 4.82 | 1,875 |
| Islands! | 17 | 0 | 4.17 | 1,844 |
| New Zealand Quizzes | 15 | 0 | 5.00 | 1,751 |
| France | 8 | 0 | - | 1,680 |
| Spain | España | 7 | 0 | 5.00 | 1,608 |
| Countries by a Single Word | 6 | 0 | - | 1,586 |
| Physical Geography by Picture | 6 | 0 | - | 1,504 |
| Notable People by City | 6 | 0 | 5.00 | 1,491 |
| Bundesliga | 3 | 0 | - | 1,420 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | - | 1,186 |
| Gassu's Tile Quizzes | 3 | 0 | 4.80 | 1,168 |
| Stoopid Quizzes | 2 | 0 | 5.00 | 1,089 |
| Gassu's City Trivia | 2 | 0 | - | 996 |
| Biggest Cities in NATO by Letter | 9 | 0 | - | 939 |
| Interesting Facts | 3 | 0 | - | 834 |
| The 30 Greatest … | 8 | 0 | - | 816 |
| JetPunk Quizzes | 7 | 0 | - | 731 |
| Animals | 2 | 0 | 4.36 | 718 |
| Cities as a Percent of the Continent | 5 | 0 | - | 523 |
| Country Details | 4 | 0 | - | 488 |
| the Nordics! | 2 | 0 | - | 456 |
| Biggest European Cities by Letter | 6 | 0 | - | 411 |
| Top 50 Largest European Cities | 1 | 0 | - | 408 |
| Most Guessed Things | 3 | 0 | - | 401 |
| Analogies | 2 | 0 | - | 371 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 347 |
| 21st Century in ... | 4 | 0 | - | 304 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 263 |
| Gassu's Discord Quizzes | 4 | 0 | - | 260 |
| The Tesla Series | 2 | 0 | - | 248 |
| Rivers | 3 | 0 | 4.82 | 247 |
| The Pacific Ocean by Letter | 3 | 0 | - | 244 |
| Random Tourist Attractions | 2 | 0 | - | 155 |
| Rumantsch | 3 | 0 | - | 55 |
| Ortschaften der Schweiz | 7 | 0 | - | 25 |
| Localités de la Suisse romande | 2 | 0 | - | 7 |
