| Series | # | | Rating | Takes |
|---|
| Quizzes mit Karten | 39 | 36 | 4.79 | 293,927 |
| Länder, die mit … beginnen | 20 | 14 | 4.75 | 222,676 |
| Deutschland | 35 | 31 | 4.65 | 219,113 |
| Gassu's SVG Quizzes | 39 | 9 | 4.59 | 188,228 |
| Länder | 48 | 47 | 4.68 | 186,403 |
| Quizz français de Gassu | 15 | 10 | 4.46 | 142,324 |
| Geschichts-Quizzes | 49 | 47 | 4.48 | 103,178 |
| The Only ... | 6 | 3 | 4.54 | 100,270 |
| Antworten sind europäische Länder | 17 | 16 | 4.77 | 82,789 |
| Fußball-Quizzes | 18 | 13 | 4.72 | 77,056 |
| Which City in ... | 3 | 3 | 4.28 | 74,025 |
| Countries by Picture | 13 | 6 | 4.32 | 72,843 |
| Geographie nach Buchstabe | 25 | 25 | 4.44 | 70,194 |
| United States Politics | 17 | 1 | 4.62 | 67,713 |
| Name a Valid Answer | 4 | 3 | 4.39 | 66,538 |
| Politik-Quizzes | 15 | 13 | 4.51 | 61,970 |
| die deutsche Sprache | 15 | 11 | 4.40 | 60,158 |
| Bilder nach Buchstabe | 25 | 25 | 4.01 | 55,083 |
| Flaggen-Quizzes | 11 | 11 | 4.77 | 53,755 |
| Antworten sind Städte | 16 | 14 | 4.34 | 52,494 |
| Die größten Städte | 15 | 13 | 4.44 | 52,265 |
| Antiquity by Centuries | 8 | 5 | 4.58 | 49,203 |
| Gewässer-Quizzes (+ Inseln) | 15 | 15 | 4.50 | 49,153 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.67 | 46,752 |
| Wikipedia Quizzes | 5 | 2 | 4.37 | 40,888 |
| Bild-Quizzes | 23 | 20 | 4.48 | 40,862 |
| Sprachen | 13 | 12 | 4.56 | 40,820 |
| Geschichte nach Buchstabe | 25 | 25 | 4.41 | 39,194 |
| Allerlei | Sonstiges | 13 | 13 | 4.49 | 38,312 |
| Religion | Mythologie | 12 | 12 | 4.51 | 33,722 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.65 | 28,613 |
| Regionen, Provinzen etc. | 11 | 10 | 4.66 | 24,085 |
| A-Z Quizzes | 15 | 1 | 4.42 | 23,961 |
| Gassu's Flag Quizzes | 3 | 1 | 4.24 | 23,940 |
| Sport-Quizzes | 9 | 8 | 4.45 | 23,929 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.29 | 23,519 |
| United States Cities | 33 | 1 | 4.47 | 22,920 |
| Zusammengefügt! | 6 | 6 | 4.72 | 22,214 |
| Pruebas de Gassu en español | 7 | 7 | 4.50 | 20,834 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.83 | 20,162 |
| Länder Trivia | 14 | 14 | 4.47 | 18,640 |
| Österreich | 6 | 6 | 4.80 | 17,546 |
| Gassu's Sports Quizzes | 29 | 1 | 4.32 | 16,779 |
| Mathematik-Quizzes | 2 | 2 | 4.58 | 16,732 |
| Tier-Quizzes | 7 | 6 | 4.05 | 16,322 |
| Geographie A-Z | 7 | 7 | 4.52 | 15,923 |
| Tourismus-Quizzes | 4 | 4 | 4.54 | 15,410 |
| Von Nord bis Süd | 4 | 4 | 4.57 | 14,476 |
| United States Geography | 22 | 1 | 4.21 | 13,471 |
| Achtung Abflug! | 4 | 3 | 4.76 | 12,827 |
| Schweiz | Suisse | Svizzera | Svizra | 6 | 6 | 4.70 | 11,742 |
| Antworten sind asiatische Länder | 4 | 4 | 4.50 | 10,385 |
| Wahrzeichen von Ländern | 4 | 4 | 4.74 | 9,906 |
| California | 5 | 1 | 4.37 | 8,771 |
| Personen nach Land | 5 | 5 | 4.44 | 8,716 |
| Gruppen von Dingen | 4 | 2 | 4.50 | 8,452 |
| Monarchie | Royals | 3 | 2 | 4.33 | 7,699 |
| Elemente (Chemie) | 2 | 2 | 4.84 | 6,556 |
| Polska | 2 | 1 | 4.84 | 6,556 |
| die 2010er | 6 | 4 | 4.37 | 6,450 |
| City Quizzes | 50 | 0 | 4.56 | 6,351 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 6,250 |
| 5 Cities by Continent by Letter | 26 | 0 | 4.09 | 6,199 |
| It's All About Countries | 38 | 0 | 4.50 | 6,048 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.77 | 5,633 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 3,760 |
| Gassu‘s Geographic Groups | 4 | 0 | - | 3,221 |
| Misc | 26 | 0 | 5.00 | 3,151 |
| Religion | 5 | 0 | 3.75 | 2,968 |
| Ereignisse nach Monat | 5 | 4 | 4.33 | 2,855 |
| Groups of Things | 6 | 0 | - | 2,508 |
| World's 50 Largest Cities | 9 | 0 | 4.14 | 2,440 |
| Switzerland | 18 | 0 | 4.80 | 2,415 |
| Largest European Cities by Letter | 23 | 0 | - | 2,375 |
| Historical Quizzes | 18 | 0 | 4.17 | 2,348 |
| Städte-Trivia | 6 | 5 | 4.50 | 1,949 |
| italiano | 3 | 1 | 4.56 | 1,885 |
| World Politics | 14 | 0 | 4.80 | 1,848 |
| Transportation | 11 | 0 | - | 1,820 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 1,654 |
| Answers are U.S. States | 11 | 0 | 3.86 | 1,597 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 1,573 |
| Donald J. Trump | 5 | 0 | - | 1,491 |
| Language Quizzes | 12 | 0 | 4.91 | 1,411 |
| Auckland Quizzes | 7 | 0 | 4.80 | 1,316 |
| Islands! | 17 | 0 | 3.83 | 1,270 |
| Germany | 9 | 0 | 4.40 | 1,259 |
| Decoder Quizzes | 7 | 0 | - | 1,236 |
| 100 Questions about … | 6 | 0 | - | 1,175 |
| US State General Knowledge | 11 | 0 | - | 1,153 |
| Italy | 5 | 0 | - | 1,149 |
| Oceania Quizzes | 5 | 0 | 4.71 | 853 |
| Gassu Quizzes | 8 | 0 | 4.71 | 831 |
| Countries by a Single Word | 6 | 0 | - | 796 |
| France | 8 | 0 | - | 780 |
| Physical Geography by Picture | 6 | 0 | - | 710 |
| Spain | España | 7 | 0 | - | 693 |
| New Zealand Quizzes | 15 | 0 | - | 656 |
| JetPunk Quizzes | 6 | 0 | - | 541 |
| Gassu's Tile Quizzes | 3 | 0 | - | 520 |
| Stoopid Quizzes | 2 | 0 | 4.56 | 485 |
| Bundesliga | 3 | 0 | - | 471 |
| Interesting Facts | 3 | 0 | - | 456 |
| Cities as a Percent of the Continent | 5 | 0 | - | 410 |
| The 30 Greatest … | 8 | 0 | - | 375 |
| Europe's Largest [...]-Letter Cities | 3 | 0 | - | 372 |
| Biggest European Cities by Letter | 6 | 0 | - | 330 |
| Gassu's City Trivia | 2 | 0 | - | 328 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 295 |
| Most Guessed Things | 3 | 0 | - | 291 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 283 |
| The Tesla Series | 4 | 0 | - | 280 |
| Country Details | 4 | 0 | - | 270 |
| Top 50 Largest European Cities | 1 | 0 | - | 248 |
| Gemeinden der Schweiz | 27 | 0 | - | 205 |
| The Pacific Ocean by Letter | 3 | 0 | - | 194 |
| Analogies | 2 | 0 | - | 191 |
| the Nordics! | 2 | 0 | - | 190 |
| Early History | 3 | 0 | - | 163 |
| Animals | 2 | 0 | - | 150 |
| Gassu's Discord Quizzes | 4 | 0 | - | 148 |
| 21st Century in ... | 4 | 0 | - | 112 |
| Communes de Suisse | 7 | 0 | - | 84 |
| Random Tourist Attractions | 2 | 0 | - | 72 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 64 |
| Rumantsch | 3 | 0 | - | 19 |
