| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.72 | 1,833,629 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,465,792 |
| Deutschland | 35 | 31 | 4.63 | 1,127,923 |
| Fußball-Quizzes | 22 | 16 | 4.38 | 929,331 |
| Länder | 48 | 47 | 4.61 | 926,598 |
| Quizz français de Gassu | 17 | 14 | 4.63 | 771,076 |
| Gassu's SVG Quizzes | 44 | 9 | 4.65 | 604,255 |
| Geschichts-Quizzes | 50 | 48 | 4.47 | 561,097 |
| Flaggen-Quizzes | 11 | 11 | 4.73 | 475,700 |
| Antworten sind europäische Länder | 17 | 17 | 4.77 | 451,890 |
| Politik-Quizzes | 15 | 13 | 4.54 | 297,936 |
| The Only ... | 5 | 3 | 4.67 | 292,155 |
| die deutsche Sprache | 15 | 11 | 4.30 | 284,116 |
| Geographie nach Buchstabe | 25 | 25 | 4.31 | 253,750 |
| Bilder nach Buchstabe | 25 | 25 | 3.75 | 252,824 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.75 | 250,343 |
| Sport-Quizzes | 11 | 10 | 4.36 | 236,093 |
| Allerlei | Sonstiges | 13 | 13 | 4.47 | 228,432 |
| Pruebas de Gassu en español | 7 | 7 | 4.37 | 200,870 |
| Die größten Städte | 15 | 13 | 4.39 | 194,354 |
| Sprachen | 13 | 12 | 4.49 | 192,815 |
| United States Politics | 18 | 1 | 4.39 | 183,887 |
| Which City in ... | 3 | 3 | 4.49 | 182,929 |
| Gewässer und Inseln | 15 | 15 | 4.52 | 181,725 |
| Bild-Quizzes | 23 | 20 | 4.22 | 161,649 |
| Countries by Picture | 13 | 6 | 4.29 | 158,989 |
| Geschichte nach Buchstabe | 25 | 25 | 4.40 | 155,103 |
| Antworten sind Städte | 16 | 14 | 4.29 | 153,359 |
| Name a Valid Answer | 3 | 3 | 4.57 | 152,584 |
| Religion | Mythologie | 12 | 12 | 4.31 | 150,169 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.65 | 129,978 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.24 | 115,395 |
| Länder Trivia | 14 | 14 | 4.43 | 114,704 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.68 | 111,189 |
| Regionen, Provinzen etc. | 11 | 10 | 4.63 | 103,774 |
| Mathematik-Quizzes | 2 | 2 | 4.34 | 101,898 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 95,630 |
| Österreich | 6 | 6 | 4.72 | 93,842 |
| Tourismus-Quizzes | 4 | 4 | 4.62 | 81,666 |
| Wikipedia Quizzes | 5 | 2 | 4.29 | 78,532 |
| United States Cities | 34 | 2 | 4.69 | 74,602 |
| Achtung Abflug! | 3 | 3 | 4.77 | 73,698 |
| Zusammengefügt! | 6 | 6 | 4.57 | 71,159 |
| City Quizzes | 53 | 2 | 4.57 | 69,486 |
| 100 Longest Rivers by Continent | 7 | 1 | 4.92 | 68,991 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 64,257 |
| Tier-Quizzes | 7 | 6 | 4.18 | 63,676 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.57 | 63,294 |
| Geographie A-Z | 7 | 7 | 4.31 | 63,165 |
| Wahrzeichen von Ländern | 4 | 4 | 4.84 | 61,199 |
| A-Z Quizzes | 15 | 1 | 4.54 | 60,733 |
| Polska | 2 | 1 | 4.88 | 58,759 |
| United States Geography | 23 | 2 | 4.37 | 50,382 |
| Personen nach Land | 5 | 5 | 4.50 | 44,387 |
| Antworten sind asiatische Länder | 4 | 4 | 4.60 | 41,783 |
| Gassu's Flag Quizzes | 3 | 1 | 4.63 | 41,092 |
| Gruppen von Dingen | 4 | 2 | 4.49 | 38,630 |
| Elemente (Chemie) | 2 | 2 | 4.66 | 36,968 |
| Gassu's Sports Quizzes | 30 | 1 | 4.27 | 36,536 |
| World's 50 Largest Cities | 26 | 0 | 4.61 | 30,102 |
| Gemeinden der Schweiz | 27 | 0 | 4.84 | 28,879 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.56 | 25,786 |
| Monarchie | Royals | 3 | 2 | 4.60 | 23,316 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.42 | 18,112 |
| italiano | 2 | 1 | 4.80 | 17,490 |
| California | 5 | 1 | 4.36 | 16,367 |
| It's All About Countries | 38 | 0 | 4.78 | 15,625 |
| Five Cities by Continent by Letter | 26 | 0 | 3.50 | 13,561 |
| Städte-Trivia | 8 | 5 | 4.50 | 11,677 |
| Communes de Suisse | 7 | 0 | 4.95 | 9,391 |
| Misc | 26 | 0 | 4.51 | 8,670 |
| Religion | 5 | 0 | 3.10 | 7,896 |
| Ereignisse nach Monat | 5 | 4 | 4.08 | 7,792 |
| Switzerland | 19 | 0 | 4.81 | 7,576 |
| Language Quizzes | 12 | 0 | 4.89 | 7,189 |
| Historical Quizzes | 19 | 0 | 4.54 | 6,849 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 6,341 |
| Gassu‘s Geographic Groups | 4 | 0 | 4.00 | 6,076 |
| Groups of Things | 6 | 0 | 3.98 | 5,989 |
| World Politics | 13 | 0 | 4.27 | 5,674 |
| Auckland Quizzes | 7 | 0 | 4.56 | 4,001 |
| Transportation | 12 | 0 | - | 3,957 |
| Largest European Cities by Letter | 23 | 0 | - | 3,279 |
| the Britons and their Commonwealth | 5 | 0 | 5.00 | 3,193 |
| Italy | 5 | 0 | 4.83 | 3,120 |
| Donald J. Trump | 5 | 0 | 3.75 | 3,060 |
| 100 Questions about … | 6 | 0 | 4.80 | 2,881 |
| All 100k+ Urban Areas | 2 | 0 | 4.92 | 2,851 |
| Germany | 10 | 0 | 4.57 | 2,837 |
| Answers are U.S. States | 11 | 0 | 3.97 | 2,780 |
| Five Biggest Cities by Region | 6 | 0 | - | 2,762 |
| All 500k+ Urban Areas | 2 | 0 | 4.73 | 2,680 |
| Decoder Quizzes | 7 | 0 | - | 2,596 |
| Gassu Quizzes | 7 | 0 | 4.44 | 2,452 |
| US State General Knowledge | 11 | 0 | - | 2,158 |
| New Zealand Quizzes | 15 | 0 | 5.00 | 2,024 |
| Oceania Quizzes | 5 | 0 | 4.82 | 1,976 |
| Islands! | 17 | 0 | 4.17 | 1,966 |
| France | 8 | 0 | - | 1,786 |
| Spain | España | 7 | 0 | 5.00 | 1,754 |
| Physical Geography by Picture | 6 | 0 | - | 1,701 |
| Countries by a Single Word | 6 | 0 | - | 1,675 |
| Notable People by City | 6 | 0 | 5.00 | 1,667 |
| Bundesliga | 3 | 0 | - | 1,523 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | - | 1,378 |
| Gassu's Tile Quizzes | 3 | 0 | 4.80 | 1,250 |
| Stoopid Quizzes | 2 | 0 | 5.00 | 1,200 |
| Biggest Cities in NATO by Letter | 9 | 0 | - | 1,187 |
| Gassu's City Trivia | 2 | 0 | - | 1,071 |
| The 30 Greatest … | 8 | 0 | - | 995 |
| Interesting Facts | 3 | 0 | - | 881 |
| Animals | 2 | 0 | 4.36 | 770 |
| JetPunk Quizzes | 7 | 0 | - | 743 |
| Country Details | 4 | 0 | - | 557 |
| Cities as a Percent of the Continent | 5 | 0 | - | 533 |
| the Nordics! | 2 | 0 | - | 493 |
| Rivers | 3 | 0 | 4.83 | 464 |
| Top 50 Largest European Cities | 1 | 0 | - | 424 |
| Biggest European Cities by Letter | 6 | 0 | - | 423 |
| Most Guessed Things | 3 | 0 | - | 410 |
| Analogies | 2 | 0 | - | 391 |
| 21st Century in ... | 4 | 0 | - | 361 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 352 |
| Gassu's Discord Quizzes | 4 | 0 | - | 321 |
| Ortschaften der Schweiz | 11 | 0 | - | 315 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 302 |
| The Tesla Series | 2 | 0 | - | 255 |
| The Pacific Ocean by Letter | 3 | 0 | - | 244 |
| Localités de la Suisse romande | 4 | 0 | - | 183 |
| Random Tourist Attractions | 2 | 0 | - | 171 |
| Rumantsch | 4 | 0 | - | 69 |
