| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.73 | 1,493,717 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,201,518 |
| Deutschland | 36 | 31 | 4.64 | 927,253 |
| Länder | 48 | 47 | 4.61 | 779,760 |
| Fußball-Quizzes | 20 | 13 | 4.35 | 723,779 |
| Quizz français de Gassu | 17 | 13 | 4.60 | 597,546 |
| Gassu's SVG Quizzes | 44 | 9 | 4.63 | 526,816 |
| Geschichts-Quizzes | 50 | 48 | 4.51 | 448,805 |
| Antworten sind europäische Länder | 17 | 16 | 4.76 | 364,526 |
| Flaggen-Quizzes | 11 | 11 | 4.72 | 356,241 |
| Politik-Quizzes | 15 | 13 | 4.53 | 248,441 |
| The Only ... | 5 | 2 | 4.54 | 245,460 |
| die deutsche Sprache | 15 | 11 | 4.34 | 227,896 |
| Geographie nach Buchstabe | 25 | 25 | 4.36 | 212,496 |
| Bilder nach Buchstabe | 25 | 25 | 3.79 | 208,684 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.74 | 205,288 |
| Allerlei | Sonstiges | 13 | 13 | 4.46 | 185,139 |
| Sport-Quizzes | 11 | 9 | 4.39 | 179,387 |
| Which City in ... | 3 | 3 | 4.45 | 161,388 |
| Die größten Städte | 15 | 13 | 4.43 | 161,350 |
| United States Politics | 18 | 1 | 4.33 | 153,605 |
| Gewässer und Inseln | 15 | 15 | 4.48 | 151,869 |
| Countries by Picture | 13 | 6 | 4.36 | 143,333 |
| Sprachen | 13 | 12 | 4.52 | 140,353 |
| Antworten sind Städte | 16 | 14 | 4.28 | 130,684 |
| Bild-Quizzes | 23 | 20 | 4.29 | 127,019 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 126,170 |
| Pruebas de Gassu en español | 7 | 7 | 4.34 | 120,841 |
| Name a Valid Answer | 3 | 2 | 4.51 | 120,183 |
| Religion | Mythologie | 12 | 12 | 4.36 | 106,693 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.63 | 104,699 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 92,618 |
| Länder Trivia | 14 | 14 | 4.47 | 89,655 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 87,317 |
| Regionen, Provinzen etc. | 11 | 10 | 4.61 | 82,025 |
| Mathematik-Quizzes | 2 | 2 | 4.40 | 82,003 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 80,476 |
| Wikipedia Quizzes | 5 | 2 | 4.28 | 71,629 |
| Österreich | 6 | 6 | 4.75 | 69,997 |
| Tourismus-Quizzes | 4 | 4 | 4.59 | 67,025 |
| City Quizzes | 53 | 2 | 4.36 | 60,212 |
| Achtung Abflug! | 3 | 3 | 4.76 | 60,114 |
| United States Cities | 34 | 2 | 4.53 | 60,004 |
| Zusammengefügt! | 6 | 6 | 4.58 | 59,970 |
| 100 Longest Rivers by Continent | 6 | 1 | 4.91 | 56,315 |
| A-Z Quizzes | 15 | 1 | 4.51 | 54,313 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 51,748 |
| Polska | 2 | 1 | 4.88 | 51,267 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 50,160 |
| Tier-Quizzes | 7 | 6 | 4.19 | 48,597 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.59 | 46,625 |
| Geographie A-Z | 7 | 7 | 4.42 | 44,392 |
| United States Geography | 23 | 2 | 4.29 | 44,389 |
| Gassu's Flag Quizzes | 3 | 1 | 4.60 | 38,250 |
| Antworten sind asiatische Länder | 4 | 4 | 4.57 | 34,402 |
| Personen nach Land | 5 | 5 | 4.58 | 32,853 |
| Gassu's Sports Quizzes | 30 | 1 | 4.25 | 32,659 |
| Gruppen von Dingen | 4 | 2 | 4.47 | 32,306 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 30,455 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.54 | 21,456 |
| Monarchie | Royals | 3 | 2 | 4.57 | 20,031 |
| Gemeinden der Schweiz | 27 | 0 | 4.82 | 19,448 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.46 | 16,435 |
| italiano | 3 | 1 | 4.78 | 15,333 |
| California | 5 | 1 | 4.66 | 15,154 |
| World's 50 Largest Cities | 9 | 0 | 4.49 | 13,469 |
| It's All About Countries | 38 | 0 | 4.49 | 12,548 |
| Five Cities by Continent by Letter | 26 | 0 | 3.75 | 12,003 |
| Städte-Trivia | 8 | 5 | 4.57 | 8,989 |
| Misc | 26 | 0 | 4.41 | 7,197 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 6,756 |
| Religion | 5 | 0 | 3.17 | 6,756 |
| Switzerland | 19 | 0 | 4.45 | 6,709 |
| Communes de Suisse | 7 | 0 | - | 6,080 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,877 |
| Historical Quizzes | 19 | 0 | 4.39 | 5,668 |
| Language Quizzes | 12 | 0 | 4.88 | 5,593 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.98 | 5,587 |
| World Politics | 13 | 0 | 4.23 | 4,883 |
| Groups of Things | 6 | 0 | 4.08 | 4,418 |
| Transportation | 12 | 0 | - | 3,506 |
| Auckland Quizzes | 7 | 0 | 4.92 | 3,228 |
| Largest European Cities by Letter | 23 | 0 | - | 3,091 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,843 |
| Italy | 5 | 0 | - | 2,616 |
| 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 | - | 2,267 |
| Decoder Quizzes | 7 | 0 | - | 2,249 |
| 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 | 1,754 |
| New Zealand Quizzes | 16 | 0 | - | 1,647 |
| France | 8 | 0 | 4.50 | 1,567 |
| Spain | España | 7 | 0 | 5.00 | 1,469 |
| Countries by a Single Word | 6 | 0 | - | 1,449 |
| All 500k+ Urban Areas | 2 | 0 | 4.60 | 1,408 |
| Physical Geography by Picture | 6 | 0 | - | 1,350 |
| Bundesliga | 3 | 0 | - | 1,295 |
| Notable People by City | 6 | 0 | 4.89 | 1,280 |
| Gassu's Tile Quizzes | 3 | 0 | 4.80 | 1,092 |
| Stoopid Quizzes | 2 | 0 | 4.71 | 1,001 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | 4.73 | 984 |
| Gassu's City Trivia | 2 | 0 | - | 929 |
| Interesting Facts | 3 | 0 | - | 791 |
| JetPunk Quizzes | 7 | 0 | - | 717 |
| Animals | 2 | 0 | 4.36 | 685 |
| The 30 Greatest … | 8 | 0 | - | 645 |
| Biggest Cities in NATO by Letter | 9 | 0 | - | 622 |
| Cities as a Percent of the Continent | 5 | 0 | - | 517 |
| Country Details | 4 | 0 | - | 434 |
| 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 | - | 217 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 172 |
| Random Tourist Attractions | 2 | 0 | - | 138 |
| Rumantsch | 3 | 0 | - | 51 |
