| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.73 | 1,462,655 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,176,339 |
| Deutschland | 36 | 31 | 4.64 | 909,411 |
| Länder | 48 | 47 | 4.61 | 765,211 |
| Fußball-Quizzes | 20 | 13 | 4.37 | 703,035 |
| Quizz français de Gassu | 17 | 13 | 4.59 | 583,207 |
| Gassu's SVG Quizzes | 44 | 9 | 4.62 | 519,930 |
| Geschichts-Quizzes | 50 | 48 | 4.51 | 432,374 |
| Antworten sind europäische Länder | 17 | 16 | 4.75 | 356,933 |
| Flaggen-Quizzes | 11 | 11 | 4.72 | 346,117 |
| Politik-Quizzes | 15 | 13 | 4.53 | 244,362 |
| The Only ... | 5 | 2 | 4.54 | 244,004 |
| die deutsche Sprache | 15 | 11 | 4.34 | 223,235 |
| Geographie nach Buchstabe | 25 | 25 | 4.36 | 208,293 |
| Bilder nach Buchstabe | 25 | 25 | 3.79 | 202,800 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.74 | 201,188 |
| Allerlei | Sonstiges | 13 | 13 | 4.46 | 180,851 |
| Sport-Quizzes | 11 | 9 | 4.39 | 176,143 |
| Which City in ... | 3 | 3 | 4.45 | 160,521 |
| Die größten Städte | 15 | 13 | 4.42 | 158,558 |
| United States Politics | 18 | 1 | 4.29 | 152,326 |
| Gewässer und Inseln | 15 | 15 | 4.50 | 149,555 |
| Countries by Picture | 13 | 6 | 4.36 | 141,745 |
| Sprachen | 13 | 12 | 4.52 | 137,823 |
| Antworten sind Städte | 16 | 14 | 4.26 | 128,796 |
| Bild-Quizzes | 23 | 20 | 4.28 | 124,497 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 122,699 |
| Name a Valid Answer | 3 | 2 | 4.50 | 119,108 |
| Pruebas de Gassu en español | 7 | 7 | 4.32 | 115,956 |
| Religion | Mythologie | 12 | 12 | 4.36 | 104,707 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.64 | 102,399 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 90,822 |
| Länder Trivia | 14 | 14 | 4.46 | 87,898 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 84,946 |
| Regionen, Provinzen etc. | 11 | 10 | 4.61 | 80,364 |
| Mathematik-Quizzes | 2 | 2 | 4.40 | 80,158 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 79,074 |
| Wikipedia Quizzes | 5 | 2 | 4.32 | 71,014 |
| Österreich | 6 | 6 | 4.75 | 68,673 |
| Tourismus-Quizzes | 4 | 4 | 4.59 | 65,707 |
| City Quizzes | 53 | 2 | 4.35 | 59,576 |
| Zusammengefügt! | 6 | 6 | 4.58 | 59,017 |
| United States Cities | 34 | 2 | 4.52 | 58,919 |
| Achtung Abflug! | 3 | 3 | 4.80 | 58,821 |
| 100 Longest Rivers by Continent | 6 | 1 | 4.92 | 55,440 |
| A-Z Quizzes | 15 | 1 | 4.51 | 53,889 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 50,552 |
| Polska | 2 | 1 | 4.87 | 49,437 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 48,891 |
| Tier-Quizzes | 7 | 6 | 4.19 | 47,443 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.59 | 45,503 |
| United States Geography | 23 | 2 | 4.29 | 43,951 |
| Geographie A-Z | 7 | 7 | 4.41 | 43,559 |
| Gassu's Flag Quizzes | 3 | 1 | 4.66 | 37,911 |
| Antworten sind asiatische Länder | 4 | 4 | 4.57 | 33,693 |
| Gassu's Sports Quizzes | 30 | 1 | 4.21 | 32,311 |
| Personen nach Land | 5 | 5 | 4.57 | 32,120 |
| Gruppen von Dingen | 4 | 2 | 4.47 | 31,677 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 29,800 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.54 | 20,959 |
| Monarchie | Royals | 3 | 2 | 4.57 | 19,683 |
| Gemeinden der Schweiz | 27 | 0 | 4.90 | 18,854 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.46 | 16,268 |
| California | 5 | 1 | 4.66 | 15,036 |
| italiano | 3 | 1 | 4.78 | 14,955 |
| World's 50 Largest Cities | 9 | 0 | 4.49 | 13,207 |
| It's All About Countries | 38 | 0 | 4.49 | 12,441 |
| Five Cities by Continent by Letter | 26 | 0 | 3.75 | 11,899 |
| Städte-Trivia | 8 | 5 | 4.57 | 8,707 |
| Misc | 26 | 0 | 4.41 | 7,124 |
| Religion | 5 | 0 | 3.17 | 6,672 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 6,653 |
| Switzerland | 19 | 0 | 4.45 | 6,641 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,872 |
| Communes de Suisse | 7 | 0 | - | 5,842 |
| Historical Quizzes | 19 | 0 | 4.39 | 5,597 |
| Language Quizzes | 12 | 0 | 4.88 | 5,547 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.98 | 5,525 |
| World Politics | 13 | 0 | 4.23 | 4,813 |
| Groups of Things | 6 | 0 | 4.08 | 4,371 |
| Transportation | 12 | 0 | - | 3,470 |
| Auckland Quizzes | 7 | 0 | 4.92 | 3,198 |
| Largest European Cities by Letter | 23 | 0 | - | 3,078 |
| the Britons and their Commonwealth | 5 | 0 | 4.88 | 2,806 |
| Italy | 5 | 0 | - | 2,577 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,505 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,490 |
| Donald J. Trump | 5 | 0 | 3.75 | 2,456 |
| Germany | 10 | 0 | 4.44 | 2,417 |
| 100 Questions about … | 6 | 0 | - | 2,238 |
| Decoder Quizzes | 7 | 0 | - | 2,233 |
| All 100k+ Urban Areas | 2 | 0 | 4.88 | 2,074 |
| Gassu Quizzes | 8 | 0 | 4.44 | 2,011 |
| US State General Knowledge | 11 | 0 | - | 1,919 |
| Oceania Quizzes | 5 | 0 | 4.75 | 1,763 |
| Islands! | 17 | 0 | 4.00 | 1,745 |
| New Zealand Quizzes | 16 | 0 | - | 1,632 |
| France | 8 | 0 | 4.50 | 1,551 |
| Spain | España | 7 | 0 | 5.00 | 1,451 |
| Countries by a Single Word | 6 | 0 | - | 1,440 |
| All 500k+ Urban Areas | 2 | 0 | 4.58 | 1,375 |
| Physical Geography by Picture | 6 | 0 | - | 1,326 |
| Bundesliga | 3 | 0 | - | 1,268 |
| Notable People by City | 6 | 0 | 4.89 | 1,250 |
| Gassu's Tile Quizzes | 3 | 0 | - | 1,081 |
| Stoopid Quizzes | 2 | 0 | 4.71 | 984 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | 4.73 | 968 |
| Gassu's City Trivia | 2 | 0 | - | 923 |
| Interesting Facts | 3 | 0 | - | 786 |
| JetPunk Quizzes | 7 | 0 | - | 714 |
| Animals | 2 | 0 | 4.36 | 678 |
| The 30 Greatest … | 8 | 0 | - | 638 |
| Cities as a Percent of the Continent | 5 | 0 | - | 515 |
| Country Details | 4 | 0 | - | 430 |
| the Nordics! | 2 | 0 | - | 415 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 406 |
| Most Guessed Things | 3 | 0 | - | 396 |
| Top 50 Largest European Cities | 1 | 0 | - | 385 |
| Biggest European Cities by Letter | 6 | 0 | - | 379 |
| Analogies | 2 | 0 | - | 346 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 334 |
| 21st Century in ... | 4 | 0 | - | 250 |
| The Tesla Series | 2 | 0 | - | 243 |
| The Pacific Ocean by Letter | 3 | 0 | - | 236 |
| Gassu's Discord Quizzes | 4 | 0 | - | 216 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 171 |
| Random Tourist Attractions | 2 | 0 | - | 138 |
| Rumantsch | 3 | 0 | - | 50 |
