| Series | # | | Rating | Takes |
|---|
| Quizzes mit Karten | 39 | 36 | 4.77 | 499,290 |
| Länder, die mit … beginnen | 20 | 14 | 4.65 | 435,135 |
| Deutschland | 35 | 31 | 4.66 | 376,027 |
| Länder | 48 | 47 | 4.61 | 321,466 |
| Gassu's SVG Quizzes | 41 | 8 | 4.59 | 293,313 |
| Quizz français de Gassu | 17 | 12 | 4.59 | 234,208 |
| Fußball-Quizzes | 18 | 13 | 4.57 | 183,767 |
| Geschichts-Quizzes | 49 | 47 | 4.46 | 174,653 |
| The Only ... | 5 | 2 | 4.55 | 142,267 |
| Antworten sind europäische Länder | 17 | 16 | 4.74 | 140,161 |
| Which City in ... | 3 | 3 | 4.43 | 112,654 |
| Flaggen-Quizzes | 11 | 11 | 4.72 | 109,562 |
| Geographie nach Buchstabe | 25 | 25 | 4.33 | 105,738 |
| United States Politics | 18 | 1 | 4.63 | 104,376 |
| Politik-Quizzes | 15 | 13 | 4.47 | 104,219 |
| die deutsche Sprache | 15 | 11 | 4.33 | 98,348 |
| Countries by Picture | 13 | 6 | 4.25 | 98,234 |
| Name a Valid Answer | 4 | 3 | 4.49 | 91,821 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.69 | 83,931 |
| Die größten Städte | 15 | 13 | 4.41 | 78,394 |
| Gewässer-Quizzes (+ Inseln) | 15 | 15 | 4.48 | 78,068 |
| Bilder nach Buchstabe | 25 | 25 | 4.02 | 75,982 |
| Antworten sind Städte | 16 | 14 | 4.24 | 73,808 |
| Allerlei | Sonstiges | 13 | 13 | 4.41 | 65,964 |
| Sprachen | 13 | 12 | 4.53 | 63,386 |
| Bild-Quizzes | 23 | 20 | 4.37 | 60,254 |
| Antiquity by Centuries | 8 | 5 | 4.66 | 59,749 |
| Geschichte nach Buchstabe | 25 | 25 | 4.38 | 58,661 |
| Sport-Quizzes | 10 | 9 | 4.30 | 56,284 |
| Religion | Mythologie | 12 | 12 | 4.37 | 52,250 |
| Wikipedia Quizzes | 5 | 2 | 4.42 | 51,718 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.62 | 43,682 |
| A-Z Quizzes | 15 | 1 | 4.47 | 43,587 |
| Regionen, Provinzen etc. | 11 | 10 | 4.54 | 38,796 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.79 | 37,406 |
| Pruebas de Gassu en español | 7 | 7 | 4.49 | 35,399 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.31 | 34,101 |
| Länder Trivia | 14 | 14 | 4.42 | 33,882 |
| Zusammengefügt! | 6 | 6 | 4.66 | 31,657 |
| Von Nord bis Süd | 4 | 4 | 4.61 | 30,569 |
| Mathematik-Quizzes | 2 | 2 | 4.51 | 30,299 |
| 100 Longest Rivers by Continent | 4 | 1 | 4.76 | 30,256 |
| United States Cities | 34 | 1 | 4.55 | 29,848 |
| Österreich | 6 | 6 | 4.74 | 29,175 |
| Gassu's Flag Quizzes | 3 | 1 | 4.27 | 28,590 |
| United States Geography | 22 | 1 | 4.11 | 26,658 |
| Geographie A-Z | 7 | 7 | 4.46 | 23,763 |
| Tier-Quizzes | 7 | 6 | 3.99 | 23,410 |
| Tourismus-Quizzes | 4 | 4 | 4.51 | 22,157 |
| Achtung Abflug! | 4 | 3 | 4.76 | 21,677 |
| Gassu's Sports Quizzes | 29 | 1 | 4.27 | 21,601 |
| Schweiz | Suisse | Svizzera | Svizra | 7 | 6 | 4.64 | 19,514 |
| Polska | 2 | 1 | 4.93 | 17,189 |
| Wahrzeichen von Ländern | 4 | 4 | 4.78 | 16,984 |
| Antworten sind asiatische Länder | 4 | 4 | 4.42 | 16,037 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.74 | 15,602 |
| Gruppen von Dingen | 4 | 2 | 4.32 | 13,836 |
| Elemente (Chemie) | 2 | 2 | 4.87 | 12,368 |
| Personen nach Land | 5 | 5 | 4.45 | 12,023 |
| California | 5 | 1 | 4.38 | 10,898 |
| Monarchie | Royals | 3 | 2 | 4.26 | 10,530 |
| die 2010er | 6 | 4 | 4.35 | 10,125 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.67 | 9,472 |
| It's All About Countries | 38 | 0 | 4.64 | 8,854 |
| 5 Cities by Continent by Letter | 26 | 0 | 4.36 | 8,030 |
| City Quizzes | 50 | 0 | 4.39 | 7,896 |
| italiano | 3 | 1 | 4.67 | 6,021 |
| Misc | 26 | 0 | 4.47 | 4,755 |
| Switzerland | 19 | 0 | 4.75 | 4,554 |
| World's 50 Largest Cities | 9 | 0 | 4.47 | 4,538 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 4,463 |
| Gemeinden der Schweiz | 27 | 0 | 4.78 | 4,344 |
| Religion | 5 | 0 | 3.76 | 4,283 |
| Language Quizzes | 12 | 0 | 4.82 | 4,254 |
| Gassu‘s Geographic Groups | 4 | 0 | - | 4,132 |
| Ereignisse nach Monat | 5 | 4 | 4.21 | 3,882 |
| Städte-Trivia | 6 | 5 | 4.30 | 3,832 |
| Historical Quizzes | 18 | 0 | 4.61 | 3,280 |
| Groups of Things | 6 | 0 | 4.14 | 3,272 |
| Largest European Cities by Letter | 23 | 0 | - | 2,628 |
| World Politics | 14 | 0 | 4.80 | 2,372 |
| Transportation | 11 | 0 | - | 2,307 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,179 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 1,895 |
| Auckland Quizzes | 7 | 0 | 4.83 | 1,890 |
| Answers are U.S. States | 11 | 0 | 3.86 | 1,889 |
| Donald J. Trump | 5 | 0 | 3.80 | 1,861 |
| Italy | 5 | 0 | - | 1,735 |
| Germany | 9 | 0 | 4.50 | 1,671 |
| Decoder Quizzes | 7 | 0 | - | 1,604 |
| 100 Questions about … | 6 | 0 | - | 1,564 |
| Islands! | 17 | 0 | 3.83 | 1,462 |
| US State General Knowledge | 11 | 0 | - | 1,383 |
| Oceania Quizzes | 5 | 0 | 4.73 | 1,258 |
| Gassu Quizzes | 8 | 0 | 4.38 | 1,208 |
| France | 8 | 0 | - | 1,042 |
| Countries by a Single Word | 6 | 0 | - | 997 |
| New Zealand Quizzes | 15 | 0 | - | 983 |
| Spain | España | 7 | 0 | 5.00 | 905 |
| Communes de Suisse | 7 | 0 | - | 882 |
| Physical Geography by Picture | 6 | 0 | - | 869 |
| Gassu's Tile Quizzes | 3 | 0 | - | 774 |
| Bundesliga | 3 | 0 | - | 726 |
| Stoopid Quizzes | 2 | 0 | 4.64 | 641 |
| JetPunk Quizzes | 6 | 0 | - | 612 |
| Interesting Facts | 3 | 0 | - | 572 |
| Gassu's City Trivia | 2 | 0 | - | 559 |
| Animals | 2 | 0 | 4.67 | 556 |
| The 30 Greatest … | 8 | 0 | - | 456 |
| Cities as a Percent of the Continent | 5 | 0 | - | 449 |
| Europe's Largest [...]-Letter Cities | 3 | 0 | - | 422 |
| Biggest European Cities by Letter | 6 | 0 | - | 355 |
| Country Details | 4 | 0 | - | 340 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 325 |
| Most Guessed Things | 3 | 0 | - | 323 |
| The Tesla Series | 4 | 0 | - | 315 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 310 |
| Top 50 Largest European Cities | 1 | 0 | - | 309 |
| the Nordics! | 2 | 0 | - | 270 |
| Analogies | 2 | 0 | - | 242 |
| Early History | 3 | 0 | - | 239 |
| The Pacific Ocean by Letter | 3 | 0 | - | 209 |
| Gassu's Discord Quizzes | 4 | 0 | - | 176 |
| 21st Century in ... | 4 | 0 | - | 148 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 97 |
| Random Tourist Attractions | 2 | 0 | - | 78 |
| Rumantsch | 3 | 0 | - | 29 |
