| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.73 | 1,531,304 |
| Quizzes mit Karten | 39 | 36 | 4.73 | 1,231,059 |
| Deutschland | 36 | 31 | 4.64 | 949,133 |
| Länder | 48 | 47 | 4.61 | 797,830 |
| Fußball-Quizzes | 20 | 13 | 4.37 | 749,298 |
| Quizz français de Gassu | 17 | 13 | 4.61 | 616,694 |
| Gassu's SVG Quizzes | 44 | 9 | 4.63 | 534,677 |
| Geschichts-Quizzes | 50 | 48 | 4.51 | 466,828 |
| Antworten sind europäische Länder | 17 | 16 | 4.77 | 374,399 |
| Flaggen-Quizzes | 11 | 11 | 4.73 | 370,133 |
| Politik-Quizzes | 15 | 13 | 4.53 | 253,461 |
| The Only ... | 5 | 3 | 4.58 | 249,735 |
| die deutsche Sprache | 15 | 11 | 4.34 | 233,417 |
| Geographie nach Buchstabe | 25 | 25 | 4.36 | 217,008 |
| Bilder nach Buchstabe | 25 | 25 | 3.80 | 214,276 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.74 | 210,498 |
| Allerlei | Sonstiges | 13 | 13 | 4.46 | 190,355 |
| Sport-Quizzes | 11 | 9 | 4.40 | 185,237 |
| Which City in ... | 3 | 3 | 4.47 | 172,778 |
| Die größten Städte | 15 | 13 | 4.41 | 164,896 |
| United States Politics | 18 | 1 | 4.33 | 155,413 |
| Gewässer und Inseln | 15 | 15 | 4.49 | 155,192 |
| Countries by Picture | 13 | 6 | 4.36 | 145,139 |
| Sprachen | 13 | 12 | 4.54 | 143,508 |
| Antworten sind Städte | 16 | 14 | 4.29 | 133,169 |
| Bild-Quizzes | 23 | 20 | 4.28 | 129,969 |
| Geschichte nach Buchstabe | 25 | 25 | 4.43 | 129,611 |
| Pruebas de Gassu en español | 7 | 7 | 4.33 | 128,342 |
| Name a Valid Answer | 3 | 2 | 4.52 | 122,841 |
| Religion | Mythologie | 12 | 12 | 4.36 | 109,145 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.64 | 108,044 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.71 | 94,962 |
| Länder Trivia | 14 | 14 | 4.47 | 91,766 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.34 | 89,772 |
| Mathematik-Quizzes | 2 | 2 | 4.38 | 85,415 |
| Regionen, Provinzen etc. | 11 | 10 | 4.62 | 83,964 |
| Von Nord bis Süd | 4 | 4 | 4.65 | 82,321 |
| Wikipedia Quizzes | 5 | 2 | 4.28 | 72,386 |
| Österreich | 6 | 6 | 4.75 | 71,823 |
| Tourismus-Quizzes | 4 | 4 | 4.59 | 68,823 |
| Achtung Abflug! | 3 | 3 | 4.76 | 61,714 |
| Zusammengefügt! | 6 | 6 | 4.58 | 61,127 |
| United States Cities | 34 | 2 | 4.53 | 61,011 |
| City Quizzes | 53 | 2 | 4.35 | 60,993 |
| 100 Longest Rivers by Continent | 7 | 1 | 4.93 | 57,107 |
| A-Z Quizzes | 15 | 1 | 4.52 | 54,741 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 53,156 |
| Polska | 2 | 1 | 4.88 | 52,433 |
| Wahrzeichen von Ländern | 4 | 4 | 4.85 | 51,658 |
| Tier-Quizzes | 7 | 6 | 4.19 | 50,018 |
| Schweiz | Suisse | Svizzera | Svizra | 9 | 7 | 4.62 | 48,008 |
| Geographie A-Z | 7 | 7 | 4.42 | 45,329 |
| United States Geography | 23 | 2 | 4.28 | 44,843 |
| Gassu's Flag Quizzes | 3 | 1 | 4.60 | 38,576 |
| Antworten sind asiatische Länder | 4 | 4 | 4.59 | 35,268 |
| Personen nach Land | 5 | 5 | 4.58 | 33,806 |
| Gruppen von Dingen | 4 | 2 | 4.47 | 33,164 |
| Gassu's Sports Quizzes | 30 | 1 | 4.23 | 33,153 |
| Elemente (Chemie) | 2 | 2 | 4.68 | 31,923 |
| Newsmeldungen - Nenne das Land | 4 | 4 | 4.54 | 21,979 |
| Monarchie | Royals | 3 | 2 | 4.57 | 20,408 |
| Gemeinden der Schweiz | 27 | 0 | 4.82 | 20,383 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.46 | 16,626 |
| italiano | 3 | 1 | 4.78 | 15,871 |
| California | 5 | 1 | 4.66 | 15,278 |
| World's 50 Largest Cities | 9 | 0 | 4.49 | 13,942 |
| It's All About Countries | 38 | 0 | 4.45 | 12,707 |
| Five Cities by Continent by Letter | 26 | 0 | 3.75 | 12,310 |
| Städte-Trivia | 8 | 5 | 4.57 | 9,343 |
| Misc | 26 | 0 | 4.39 | 7,301 |
| Religion | 5 | 0 | 3.17 | 6,879 |
| Ereignisse nach Monat | 5 | 4 | 4.10 | 6,877 |
| Switzerland | 19 | 0 | 4.45 | 6,797 |
| Communes de Suisse | 7 | 0 | - | 6,349 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,930 |
| Historical Quizzes | 19 | 0 | 4.39 | 5,782 |
| Language Quizzes | 12 | 0 | 4.88 | 5,676 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.98 | 5,658 |
| Groups of Things | 6 | 0 | 3.87 | 5,491 |
| World Politics | 13 | 0 | 4.23 | 4,956 |
| Transportation | 12 | 0 | - | 3,542 |
| Auckland Quizzes | 7 | 0 | 4.92 | 3,286 |
| Largest European Cities by Letter | 23 | 0 | - | 3,097 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,893 |
| Italy | 5 | 0 | 4.80 | 2,677 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,546 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,540 |
| Germany | 10 | 0 | 4.44 | 2,505 |
| Donald J. Trump | 5 | 0 | 3.89 | 2,505 |
| 100 Questions about … | 6 | 0 | - | 2,306 |
| Decoder Quizzes | 7 | 0 | - | 2,281 |
| All 100k+ Urban Areas | 2 | 0 | 4.88 | 2,127 |
| Gassu Quizzes | 8 | 0 | 4.44 | 2,056 |
| US State General Knowledge | 11 | 0 | - | 1,946 |
| Oceania Quizzes | 5 | 0 | 4.75 | 1,803 |
| Islands! | 17 | 0 | 4.00 | 1,764 |
| New Zealand Quizzes | 16 | 0 | - | 1,682 |
| France | 8 | 0 | 4.50 | 1,587 |
| Spain | España | 7 | 0 | 5.00 | 1,499 |
| Countries by a Single Word | 6 | 0 | - | 1,476 |
| All 500k+ Urban Areas | 2 | 0 | 4.70 | 1,472 |
| Physical Geography by Picture | 6 | 0 | - | 1,370 |
| Bundesliga | 3 | 0 | - | 1,325 |
| Notable People by City | 6 | 0 | 4.89 | 1,314 |
| Gassu's Tile Quizzes | 3 | 0 | 4.80 | 1,110 |
| Europe's Largest [...]-Letter Cities | 7 | 0 | 4.73 | 1,022 |
| Stoopid Quizzes | 2 | 0 | 4.71 | 1,017 |
| Gassu's City Trivia | 2 | 0 | - | 939 |
| Interesting Facts | 3 | 0 | - | 808 |
| JetPunk Quizzes | 7 | 0 | - | 720 |
| Biggest Cities in NATO by Letter | 9 | 0 | - | 704 |
| Animals | 2 | 0 | 4.36 | 693 |
| The 30 Greatest … | 8 | 0 | - | 658 |
| Cities as a Percent of the Continent | 5 | 0 | - | 518 |
| Country Details | 4 | 0 | - | 446 |
| the Nordics! | 2 | 0 | - | 424 |
| Most Guessed Things | 3 | 0 | - | 396 |
| Top 50 Largest European Cities | 1 | 0 | - | 394 |
| Biggest European Cities by Letter | 6 | 0 | - | 384 |
| Analogies | 2 | 0 | - | 353 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 334 |
| 21st Century in ... | 4 | 0 | - | 261 |
| The Tesla Series | 2 | 0 | - | 246 |
| The Pacific Ocean by Letter | 3 | 0 | - | 236 |
| Gassu's Discord Quizzes | 4 | 0 | - | 225 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 188 |
| Random Tourist Attractions | 2 | 0 | - | 139 |
| Rumantsch | 3 | 0 | - | 52 |
