| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.73 | 1,495,463 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,202,766 |
| Deutschland | 36 | 31 | 4.64 | 928,283 |
| Länder | 48 | 47 | 4.61 | 780,665 |
| Fußball-Quizzes | 20 | 13 | 4.36 | 725,027 |
| Quizz français de Gassu | 17 | 13 | 4.60 | 599,111 |
| Gassu's SVG Quizzes | 44 | 9 | 4.63 | 527,226 |
| Geschichts-Quizzes | 50 | 48 | 4.51 | 449,683 |
| Antworten sind europäische Länder | 17 | 16 | 4.76 | 365,050 |
| Flaggen-Quizzes | 11 | 11 | 4.72 | 356,860 |
| Politik-Quizzes | 15 | 13 | 4.53 | 248,663 |
| The Only ... | 5 | 2 | 4.54 | 245,538 |
| die deutsche Sprache | 15 | 11 | 4.34 | 228,122 |
| Geographie nach Buchstabe | 25 | 25 | 4.36 | 212,722 |
| Bilder nach Buchstabe | 25 | 25 | 3.78 | 208,876 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.74 | 205,510 |
| Allerlei | Sonstiges | 13 | 13 | 4.46 | 185,340 |
| Sport-Quizzes | 11 | 9 | 4.39 | 179,609 |
| Die größten Städte | 15 | 13 | 4.43 | 161,503 |
| Which City in ... | 3 | 3 | 4.45 | 161,427 |
| United States Politics | 18 | 1 | 4.33 | 153,657 |
| Gewässer und Inseln | 15 | 15 | 4.48 | 151,978 |
| Countries by Picture | 13 | 6 | 4.36 | 143,415 |
| Sprachen | 13 | 12 | 4.53 | 140,499 |
| Antworten sind Städte | 16 | 14 | 4.28 | 130,793 |
| Bild-Quizzes | 23 | 20 | 4.29 | 127,169 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 126,300 |
| Pruebas de Gassu en español | 7 | 7 | 4.34 | 121,081 |
| Name a Valid Answer | 3 | 2 | 4.51 | 120,245 |
| Religion | Mythologie | 12 | 12 | 4.36 | 106,813 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.63 | 104,869 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 92,732 |
| Länder Trivia | 14 | 14 | 4.47 | 89,738 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 87,412 |
| Regionen, Provinzen etc. | 11 | 10 | 4.61 | 82,137 |
| Mathematik-Quizzes | 2 | 2 | 4.40 | 82,098 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 80,579 |
| Wikipedia Quizzes | 5 | 2 | 4.28 | 71,668 |
| Österreich | 6 | 6 | 4.75 | 70,117 |
| Tourismus-Quizzes | 4 | 4 | 4.59 | 67,123 |
| City Quizzes | 53 | 2 | 4.36 | 60,248 |
| Achtung Abflug! | 3 | 3 | 4.76 | 60,214 |
| United States Cities | 34 | 2 | 4.53 | 60,048 |
| Zusammengefügt! | 6 | 6 | 4.58 | 60,014 |
| 100 Longest Rivers by Continent | 6 | 1 | 4.91 | 56,349 |
| A-Z Quizzes | 15 | 1 | 4.51 | 54,334 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 51,826 |
| Polska | 2 | 1 | 4.88 | 51,321 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 50,230 |
| Tier-Quizzes | 7 | 6 | 4.19 | 48,660 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.59 | 46,701 |
| Geographie A-Z | 7 | 7 | 4.42 | 44,434 |
| United States Geography | 23 | 2 | 4.29 | 44,425 |
| Gassu's Flag Quizzes | 3 | 1 | 4.60 | 38,261 |
| Antworten sind asiatische Länder | 4 | 4 | 4.57 | 34,446 |
| Personen nach Land | 5 | 5 | 4.58 | 32,916 |
| Gassu's Sports Quizzes | 30 | 1 | 4.23 | 32,675 |
| Gruppen von Dingen | 4 | 2 | 4.47 | 32,434 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 30,483 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.54 | 21,493 |
| Monarchie | Royals | 3 | 2 | 4.57 | 20,040 |
| Gemeinden der Schweiz | 27 | 0 | 4.82 | 19,501 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.46 | 16,444 |
| italiano | 3 | 1 | 4.78 | 15,364 |
| California | 5 | 1 | 4.66 | 15,163 |
| World's 50 Largest Cities | 9 | 0 | 4.49 | 13,480 |
| It's All About Countries | 38 | 0 | 4.49 | 12,552 |
| Five Cities by Continent by Letter | 26 | 0 | 3.75 | 12,057 |
| Städte-Trivia | 8 | 5 | 4.57 | 9,003 |
| Misc | 26 | 0 | 4.41 | 7,200 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 6,761 |
| Religion | 5 | 0 | 3.17 | 6,761 |
| Switzerland | 19 | 0 | 4.45 | 6,714 |
| Communes de Suisse | 7 | 0 | - | 6,090 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,879 |
| Historical Quizzes | 19 | 0 | 4.39 | 5,670 |
| Language Quizzes | 12 | 0 | 4.88 | 5,595 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.98 | 5,591 |
| World Politics | 13 | 0 | 4.23 | 4,887 |
| Groups of Things | 6 | 0 | 4.08 | 4,420 |
| Transportation | 12 | 0 | - | 3,507 |
| Auckland Quizzes | 7 | 0 | 4.92 | 3,230 |
| Largest European Cities by Letter | 23 | 0 | - | 3,092 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,845 |
| Italy | 5 | 0 | - | 2,619 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,518 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,516 |
| Donald J. Trump | 5 | 0 | 3.75 | 2,473 |
| Germany | 10 | 0 | 4.44 | 2,467 |
| 100 Questions about … | 6 | 0 | - | 2,268 |
| Decoder Quizzes | 7 | 0 | - | 2,250 |
| All 100k+ Urban Areas | 2 | 0 | 4.88 | 2,095 |
| Gassu Quizzes | 8 | 0 | 4.44 | 2,034 |
| US State General Knowledge | 11 | 0 | - | 1,931 |
| Oceania Quizzes | 5 | 0 | 4.75 | 1,775 |
| Islands! | 17 | 0 | 4.00 | 1,755 |
| New Zealand Quizzes | 16 | 0 | - | 1,647 |
| France | 8 | 0 | 4.50 | 1,567 |
| Spain | España | 7 | 0 | 5.00 | 1,470 |
| Countries by a Single Word | 6 | 0 | - | 1,450 |
| All 500k+ Urban Areas | 2 | 0 | 4.70 | 1,412 |
| Physical Geography by Picture | 6 | 0 | - | 1,350 |
| Bundesliga | 3 | 0 | - | 1,296 |
| Notable People by City | 6 | 0 | 4.89 | 1,280 |
| Gassu's Tile Quizzes | 3 | 0 | 4.80 | 1,093 |
| Stoopid Quizzes | 2 | 0 | 4.71 | 1,001 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | 4.73 | 985 |
| Gassu's City Trivia | 2 | 0 | - | 929 |
| Interesting Facts | 3 | 0 | - | 792 |
| JetPunk Quizzes | 7 | 0 | - | 717 |
| Animals | 2 | 0 | 4.36 | 685 |
| Biggest Cities in NATO by Letter | 9 | 0 | - | 648 |
| The 30 Greatest … | 8 | 0 | - | 645 |
| Cities as a Percent of the Continent | 5 | 0 | - | 517 |
| Country Details | 4 | 0 | - | 436 |
| the Nordics! | 2 | 0 | - | 423 |
| Most Guessed Things | 3 | 0 | - | 396 |
| Top 50 Largest European Cities | 1 | 0 | - | 387 |
| Biggest European Cities by Letter | 6 | 0 | - | 380 |
| Analogies | 2 | 0 | - | 347 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 334 |
| 21st Century in ... | 4 | 0 | - | 255 |
| The Tesla Series | 2 | 0 | - | 243 |
| The Pacific Ocean by Letter | 3 | 0 | - | 236 |
| Gassu's Discord Quizzes | 4 | 0 | - | 218 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 172 |
| Random Tourist Attractions | 2 | 0 | - | 138 |
| Rumantsch | 3 | 0 | - | 51 |
