| Series | # | | Rating | Takes |
|---|
| Quizzes mit Karten | 39 | 36 | 4.77 | 348,538 |
| Länder, die mit … beginnen | 20 | 14 | 4.72 | 274,980 |
| Deutschland | 35 | 31 | 4.66 | 263,979 |
| Gassu's SVG Quizzes | 39 | 9 | 4.58 | 239,065 |
| Länder | 48 | 47 | 4.65 | 229,955 |
| Quizz français de Gassu | 15 | 11 | 4.51 | 160,488 |
| Geschichts-Quizzes | 49 | 47 | 4.52 | 123,695 |
| The Only ... | 5 | 2 | 4.70 | 103,371 |
| Antworten sind europäische Länder | 17 | 16 | 4.73 | 100,661 |
| Fußball-Quizzes | 18 | 13 | 4.69 | 94,923 |
| Which City in ... | 3 | 3 | 4.34 | 89,504 |
| Geographie nach Buchstabe | 25 | 25 | 4.50 | 81,687 |
| Countries by Picture | 13 | 6 | 4.33 | 80,587 |
| United States Politics | 17 | 1 | 4.62 | 75,147 |
| Name a Valid Answer | 4 | 3 | 4.43 | 73,440 |
| Politik-Quizzes | 15 | 13 | 4.50 | 73,436 |
| die deutsche Sprache | 15 | 11 | 4.39 | 70,808 |
| Flaggen-Quizzes | 11 | 11 | 4.70 | 66,213 |
| Bilder nach Buchstabe | 25 | 25 | 4.03 | 61,871 |
| Die größten Städte | 15 | 13 | 4.43 | 60,122 |
| Antworten sind Städte | 16 | 14 | 4.26 | 58,776 |
| Gewässer-Quizzes (+ Inseln) | 15 | 15 | 4.51 | 56,908 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.72 | 56,899 |
| Antiquity by Centuries | 8 | 5 | 4.59 | 52,169 |
| Sprachen | 13 | 12 | 4.55 | 48,019 |
| Bild-Quizzes | 23 | 20 | 4.43 | 47,309 |
| Allerlei | Sonstiges | 13 | 13 | 4.45 | 46,747 |
| Geschichte nach Buchstabe | 25 | 25 | 4.38 | 45,636 |
| Wikipedia Quizzes | 5 | 2 | 4.32 | 43,968 |
| Religion | Mythologie | 12 | 12 | 4.44 | 40,804 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.68 | 33,084 |
| Sport-Quizzes | 9 | 8 | 4.29 | 30,296 |
| Regionen, Provinzen etc. | 11 | 10 | 4.59 | 28,744 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 26,878 |
| United States Cities | 33 | 1 | 4.52 | 25,537 |
| A-Z Quizzes | 15 | 1 | 4.42 | 25,457 |
| Gassu's Flag Quizzes | 3 | 1 | 4.25 | 25,260 |
| Zusammengefügt! | 6 | 6 | 4.71 | 25,147 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.79 | 24,399 |
| Pruebas de Gassu en español | 7 | 7 | 4.42 | 24,078 |
| Länder Trivia | 14 | 14 | 4.46 | 22,923 |
| Österreich | 6 | 6 | 4.80 | 20,976 |
| Mathematik-Quizzes | 2 | 2 | 4.59 | 20,568 |
| Von Nord bis Süd | 4 | 4 | 4.54 | 19,972 |
| Tier-Quizzes | 7 | 6 | 4.03 | 18,575 |
| Geographie A-Z | 7 | 7 | 4.52 | 18,530 |
| Gassu's Sports Quizzes | 29 | 1 | 4.32 | 18,079 |
| Tourismus-Quizzes | 4 | 4 | 4.42 | 17,663 |
| Achtung Abflug! | 4 | 3 | 4.72 | 16,125 |
| Schweiz | Suisse | Svizzera | Svizra | 6 | 6 | 4.68 | 14,238 |
| United States Geography | 22 | 1 | 4.23 | 14,146 |
| Antworten sind asiatische Länder | 4 | 4 | 4.41 | 12,613 |
| Wahrzeichen von Ländern | 4 | 4 | 4.79 | 12,312 |
| Gruppen von Dingen | 4 | 2 | 4.44 | 10,777 |
| Personen nach Land | 5 | 5 | 4.42 | 9,758 |
| California | 5 | 1 | 4.40 | 9,510 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.72 | 9,017 |
| Elemente (Chemie) | 2 | 2 | 4.86 | 8,968 |
| Monarchie | Royals | 3 | 2 | 4.34 | 8,685 |
| Polska | 2 | 1 | 4.86 | 7,697 |
| die 2010er | 6 | 4 | 4.35 | 7,438 |
| City Quizzes | 50 | 0 | 4.33 | 6,962 |
| 5 Cities by Continent by Letter | 26 | 0 | 4.12 | 6,860 |
| It's All About Countries | 38 | 0 | 4.54 | 6,668 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.78 | 6,592 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 3,998 |
| Gassu‘s Geographic Groups | 4 | 0 | - | 3,517 |
| Religion | 5 | 0 | 3.70 | 3,471 |
| Misc | 26 | 0 | 5.00 | 3,412 |
| Ereignisse nach Monat | 5 | 4 | 4.37 | 3,202 |
| World's 50 Largest Cities | 9 | 0 | 4.14 | 3,108 |
| Groups of Things | 6 | 0 | 3.90 | 2,746 |
| Switzerland | 18 | 0 | 4.80 | 2,730 |
| Historical Quizzes | 18 | 0 | 4.59 | 2,619 |
| italiano | 3 | 1 | 4.56 | 2,488 |
| Largest European Cities by Letter | 23 | 0 | - | 2,444 |
| Städte-Trivia | 6 | 5 | 4.20 | 2,390 |
| World Politics | 14 | 0 | 4.80 | 2,000 |
| Transportation | 11 | 0 | - | 1,948 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 1,848 |
| Answers are U.S. States | 11 | 0 | 3.86 | 1,696 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 1,686 |
| Donald J. Trump | 5 | 0 | - | 1,640 |
| Language Quizzes | 12 | 0 | 4.91 | 1,568 |
| Auckland Quizzes | 7 | 0 | 4.80 | 1,540 |
| Gemeinden der Schweiz | 27 | 0 | 4.83 | 1,430 |
| Germany | 9 | 0 | 4.40 | 1,383 |
| Decoder Quizzes | 7 | 0 | - | 1,351 |
| Islands! | 17 | 0 | 3.83 | 1,342 |
| Italy | 5 | 0 | - | 1,332 |
| 100 Questions about … | 6 | 0 | - | 1,311 |
| US State General Knowledge | 11 | 0 | - | 1,230 |
| Gassu Quizzes | 8 | 0 | 4.38 | 954 |
| Oceania Quizzes | 5 | 0 | 4.63 | 941 |
| Countries by a Single Word | 6 | 0 | - | 863 |
| France | 8 | 0 | - | 859 |
| Spain | España | 7 | 0 | - | 766 |
| New Zealand Quizzes | 15 | 0 | - | 752 |
| Physical Geography by Picture | 6 | 0 | - | 751 |
| Gassu's Tile Quizzes | 3 | 0 | - | 636 |
| JetPunk Quizzes | 6 | 0 | - | 571 |
| Stoopid Quizzes | 2 | 0 | 4.60 | 524 |
| Bundesliga | 3 | 0 | - | 524 |
| Animals | 2 | 0 | 4.67 | 518 |
| Interesting Facts | 3 | 0 | - | 496 |
| Cities as a Percent of the Continent | 5 | 0 | - | 425 |
| The 30 Greatest … | 8 | 0 | - | 417 |
| Europe's Largest [...]-Letter Cities | 3 | 0 | - | 394 |
| Gassu's City Trivia | 2 | 0 | - | 378 |
| Biggest European Cities by Letter | 6 | 0 | - | 344 |
| Most Guessed Things | 3 | 0 | - | 302 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 301 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 294 |
| The Tesla Series | 4 | 0 | - | 285 |
| Country Details | 4 | 0 | - | 280 |
| Top 50 Largest European Cities | 1 | 0 | - | 271 |
| Communes de Suisse | 7 | 0 | - | 238 |
| Analogies | 2 | 0 | - | 228 |
| the Nordics! | 2 | 0 | - | 215 |
| The Pacific Ocean by Letter | 3 | 0 | - | 194 |
| Early History | 3 | 0 | - | 176 |
| Gassu's Discord Quizzes | 4 | 0 | - | 160 |
| 21st Century in ... | 4 | 0 | - | 115 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 81 |
| Random Tourist Attractions | 2 | 0 | - | 72 |
| Rumantsch | 3 | 0 | - | 21 |
