| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.73 | 1,471,195 |
| Quizzes mit Karten | 39 | 36 | 4.74 | 1,183,663 |
| Deutschland | 36 | 31 | 4.64 | 914,401 |
| Länder | 48 | 47 | 4.61 | 769,245 |
| Fußball-Quizzes | 20 | 13 | 4.35 | 709,469 |
| Quizz français de Gassu | 17 | 13 | 4.59 | 586,862 |
| Gassu's SVG Quizzes | 44 | 9 | 4.63 | 521,546 |
| Geschichts-Quizzes | 50 | 48 | 4.51 | 435,543 |
| Antworten sind europäische Länder | 17 | 16 | 4.75 | 359,021 |
| Flaggen-Quizzes | 11 | 11 | 4.72 | 348,980 |
| Politik-Quizzes | 15 | 13 | 4.53 | 245,553 |
| The Only ... | 5 | 2 | 4.54 | 244,387 |
| die deutsche Sprache | 15 | 11 | 4.34 | 224,443 |
| Geographie nach Buchstabe | 25 | 25 | 4.36 | 209,344 |
| Bilder nach Buchstabe | 25 | 25 | 3.79 | 204,495 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.73 | 202,437 |
| Allerlei | Sonstiges | 13 | 13 | 4.46 | 181,947 |
| Sport-Quizzes | 11 | 9 | 4.39 | 177,056 |
| Which City in ... | 3 | 3 | 4.45 | 160,733 |
| Die größten Städte | 15 | 13 | 4.43 | 159,325 |
| United States Politics | 18 | 1 | 4.29 | 152,656 |
| Gewässer und Inseln | 15 | 15 | 4.48 | 150,235 |
| Countries by Picture | 13 | 6 | 4.36 | 142,195 |
| Sprachen | 13 | 12 | 4.52 | 138,496 |
| Antworten sind Städte | 16 | 14 | 4.27 | 129,295 |
| Bild-Quizzes | 23 | 20 | 4.28 | 125,215 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 123,584 |
| Name a Valid Answer | 3 | 2 | 4.50 | 119,371 |
| Pruebas de Gassu en español | 7 | 7 | 4.32 | 116,954 |
| Religion | Mythologie | 12 | 12 | 4.36 | 105,268 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.64 | 103,033 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 91,308 |
| Länder Trivia | 14 | 14 | 4.46 | 88,375 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 85,675 |
| Regionen, Provinzen etc. | 11 | 10 | 4.61 | 80,773 |
| Mathematik-Quizzes | 2 | 2 | 4.40 | 80,553 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 79,489 |
| Wikipedia Quizzes | 5 | 2 | 4.32 | 71,181 |
| Österreich | 6 | 6 | 4.75 | 69,017 |
| Tourismus-Quizzes | 4 | 4 | 4.59 | 66,060 |
| City Quizzes | 53 | 2 | 4.35 | 59,750 |
| Zusammengefügt! | 6 | 6 | 4.58 | 59,251 |
| United States Cities | 34 | 2 | 4.52 | 59,244 |
| Achtung Abflug! | 3 | 3 | 4.80 | 59,161 |
| 100 Longest Rivers by Continent | 6 | 1 | 4.92 | 55,656 |
| A-Z Quizzes | 15 | 1 | 4.51 | 53,988 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 50,840 |
| Polska | 2 | 1 | 4.88 | 50,082 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 49,224 |
| Tier-Quizzes | 7 | 6 | 4.19 | 47,779 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.59 | 45,871 |
| United States Geography | 23 | 2 | 4.29 | 44,095 |
| Geographie A-Z | 7 | 7 | 4.41 | 43,811 |
| Gassu's Flag Quizzes | 3 | 1 | 4.66 | 37,994 |
| Antworten sind asiatische Länder | 4 | 4 | 4.57 | 33,896 |
| Gassu's Sports Quizzes | 30 | 1 | 4.25 | 32,396 |
| Personen nach Land | 5 | 5 | 4.58 | 32,314 |
| Gruppen von Dingen | 4 | 2 | 4.47 | 31,857 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 30,031 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.54 | 21,113 |
| Monarchie | Royals | 3 | 2 | 4.57 | 19,771 |
| Gemeinden der Schweiz | 27 | 0 | 4.90 | 18,981 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.46 | 16,316 |
| California | 5 | 1 | 4.66 | 15,070 |
| italiano | 3 | 1 | 4.78 | 15,053 |
| World's 50 Largest Cities | 9 | 0 | 4.49 | 13,290 |
| It's All About Countries | 38 | 0 | 4.49 | 12,462 |
| Five Cities by Continent by Letter | 26 | 0 | 3.75 | 11,914 |
| Städte-Trivia | 8 | 5 | 4.57 | 8,756 |
| Misc | 26 | 0 | 4.41 | 7,141 |
| Religion | 5 | 0 | 3.17 | 6,694 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 6,680 |
| Switzerland | 19 | 0 | 4.45 | 6,655 |
| Communes de Suisse | 7 | 0 | - | 5,932 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,872 |
| Historical Quizzes | 19 | 0 | 4.39 | 5,619 |
| Language Quizzes | 12 | 0 | 4.88 | 5,557 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.98 | 5,535 |
| World Politics | 13 | 0 | 4.23 | 4,841 |
| Groups of Things | 6 | 0 | 4.08 | 4,379 |
| Transportation | 12 | 0 | - | 3,478 |
| Auckland Quizzes | 7 | 0 | 4.92 | 3,207 |
| Largest European Cities by Letter | 23 | 0 | - | 3,079 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,815 |
| Italy | 5 | 0 | - | 2,583 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,507 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,490 |
| Donald J. Trump | 5 | 0 | 3.75 | 2,457 |
| Germany | 10 | 0 | 4.44 | 2,425 |
| 100 Questions about … | 6 | 0 | - | 2,246 |
| Decoder Quizzes | 7 | 0 | - | 2,236 |
| All 100k+ Urban Areas | 2 | 0 | 4.88 | 2,080 |
| Gassu Quizzes | 8 | 0 | 4.44 | 2,020 |
| US State General Knowledge | 11 | 0 | - | 1,921 |
| Oceania Quizzes | 5 | 0 | 4.75 | 1,765 |
| Islands! | 17 | 0 | 4.00 | 1,749 |
| New Zealand Quizzes | 16 | 0 | - | 1,636 |
| France | 8 | 0 | 4.50 | 1,555 |
| Spain | España | 7 | 0 | 5.00 | 1,455 |
| Countries by a Single Word | 6 | 0 | - | 1,443 |
| All 500k+ Urban Areas | 2 | 0 | 4.58 | 1,384 |
| Physical Geography by Picture | 6 | 0 | - | 1,336 |
| Bundesliga | 3 | 0 | - | 1,273 |
| Notable People by City | 6 | 0 | 4.89 | 1,263 |
| Gassu's Tile Quizzes | 3 | 0 | - | 1,083 |
| Stoopid Quizzes | 2 | 0 | 4.71 | 988 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | 4.73 | 968 |
| Gassu's City Trivia | 2 | 0 | - | 925 |
| Interesting Facts | 3 | 0 | - | 788 |
| JetPunk Quizzes | 7 | 0 | - | 715 |
| Animals | 2 | 0 | 4.36 | 679 |
| The 30 Greatest … | 8 | 0 | - | 639 |
| Cities as a Percent of the Continent | 5 | 0 | - | 515 |
| Country Details | 4 | 0 | - | 431 |
| the Nordics! | 2 | 0 | - | 417 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 406 |
| Most Guessed Things | 3 | 0 | - | 396 |
| Top 50 Largest European Cities | 1 | 0 | - | 386 |
| 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 | - | 172 |
| Random Tourist Attractions | 2 | 0 | - | 138 |
| Rumantsch | 3 | 0 | - | 50 |
