| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.69 | 874,035 |
| Quizzes mit Karten | 39 | 36 | 4.75 | 740,444 |
| Deutschland | 35 | 31 | 4.64 | 548,554 |
| Länder | 48 | 47 | 4.62 | 455,623 |
| Gassu's SVG Quizzes | 41 | 9 | 4.60 | 390,268 |
| Fußball-Quizzes | 18 | 13 | 4.35 | 375,301 |
| Quizz français de Gassu | 17 | 12 | 4.51 | 326,601 |
| Geschichts-Quizzes | 49 | 47 | 4.46 | 239,591 |
| Antworten sind europäische Länder | 17 | 16 | 4.71 | 214,668 |
| Flaggen-Quizzes | 11 | 11 | 4.73 | 189,023 |
| The Only ... | 5 | 2 | 4.55 | 185,849 |
| Politik-Quizzes | 15 | 13 | 4.48 | 150,275 |
| die deutsche Sprache | 15 | 11 | 4.33 | 142,675 |
| Geographie nach Buchstabe | 25 | 25 | 4.32 | 137,248 |
| Which City in ... | 3 | 3 | 4.45 | 130,846 |
| United States Politics | 18 | 1 | 4.43 | 125,664 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.66 | 124,949 |
| Countries by Picture | 13 | 6 | 4.32 | 115,374 |
| Name a Valid Answer | 4 | 3 | 4.48 | 109,368 |
| Bilder nach Buchstabe | 25 | 25 | 3.82 | 106,681 |
| Die größten Städte | 15 | 13 | 4.43 | 104,702 |
| Allerlei | Sonstiges | 13 | 13 | 4.40 | 104,002 |
| Gewässer-Quizzes (+ Inseln) | 15 | 15 | 4.50 | 102,629 |
| Sport-Quizzes | 10 | 9 | 4.40 | 95,212 |
| Antworten sind Städte | 16 | 14 | 4.32 | 91,280 |
| Sprachen | 13 | 12 | 4.49 | 89,029 |
| Bild-Quizzes | 23 | 20 | 4.31 | 78,826 |
| Geschichte nach Buchstabe | 25 | 25 | 4.33 | 75,726 |
| Antiquity by Centuries | 8 | 7 | 4.59 | 71,390 |
| Religion | Mythologie | 12 | 12 | 4.38 | 67,615 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.57 | 65,255 |
| Wikipedia Quizzes | 5 | 2 | 4.41 | 59,329 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.76 | 55,396 |
| Pruebas de Gassu en español | 7 | 7 | 4.48 | 53,180 |
| Länder Trivia | 14 | 14 | 4.40 | 52,432 |
| Regionen, Provinzen etc. | 11 | 10 | 4.55 | 52,051 |
| Von Nord bis Süd | 4 | 4 | 4.64 | 49,278 |
| Mathematik-Quizzes | 2 | 2 | 4.38 | 48,181 |
| A-Z Quizzes | 15 | 1 | 4.50 | 47,530 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.28 | 44,877 |
| Österreich | 6 | 6 | 4.75 | 43,060 |
| United States Cities | 34 | 1 | 4.51 | 41,958 |
| Zusammengefügt! | 6 | 6 | 4.66 | 41,726 |
| 100 Longest Rivers by Continent | 5 | 1 | 4.75 | 39,843 |
| Polska | 2 | 1 | 4.87 | 34,023 |
| Gassu's Flag Quizzes | 3 | 1 | 4.64 | 32,949 |
| Tourismus-Quizzes | 4 | 4 | 4.54 | 32,606 |
| Achtung Abflug! | 4 | 3 | 4.72 | 32,214 |
| Geographie A-Z | 7 | 7 | 4.41 | 31,140 |
| Tier-Quizzes | 7 | 6 | 4.12 | 30,204 |
| United States Geography | 22 | 1 | 4.12 | 27,710 |
| Schweiz | Suisse | Svizzera | Svizra | 7 | 6 | 4.65 | 26,481 |
| Gassu's Sports Quizzes | 29 | 1 | 4.17 | 26,314 |
| Wahrzeichen von Ländern | 4 | 4 | 4.82 | 25,145 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.71 | 25,081 |
| Antworten sind asiatische Länder | 4 | 4 | 4.46 | 21,568 |
| Gruppen von Dingen | 4 | 2 | 4.31 | 20,544 |
| Elemente (Chemie) | 2 | 2 | 4.83 | 18,178 |
| Personen nach Land | 5 | 5 | 4.47 | 15,800 |
| Monarchie | Royals | 3 | 2 | 4.49 | 14,306 |
| die 2010er | 6 | 4 | 4.46 | 13,125 |
| California | 5 | 1 | 4.40 | 12,542 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.68 | 11,969 |
| It's All About Countries | 38 | 0 | 4.47 | 10,149 |
| 5 Cities by Continent by Letter | 26 | 0 | 3.75 | 9,445 |
| italiano | 3 | 1 | 4.72 | 9,228 |
| City Quizzes | 50 | 0 | 4.33 | 8,804 |
| Gemeinden der Schweiz | 27 | 0 | 4.96 | 8,737 |
| World's 50 Largest Cities | 9 | 0 | 4.47 | 5,874 |
| Misc | 26 | 0 | 4.37 | 5,688 |
| Switzerland | 19 | 0 | 4.44 | 5,328 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,303 |
| Religion | 5 | 0 | 3.26 | 5,075 |
| Städte-Trivia | 6 | 5 | 4.33 | 5,004 |
| Language Quizzes | 12 | 0 | 4.85 | 4,787 |
| Ereignisse nach Monat | 5 | 4 | 4.21 | 4,744 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.80 | 4,636 |
| Historical Quizzes | 18 | 0 | 4.56 | 3,880 |
| Groups of Things | 6 | 0 | 4.20 | 3,680 |
| Largest European Cities by Letter | 23 | 0 | - | 2,850 |
| World Politics | 14 | 0 | 4.14 | 2,778 |
| Transportation | 11 | 0 | - | 2,674 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,415 |
| Auckland Quizzes | 7 | 0 | 4.92 | 2,223 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,142 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,129 |
| Italy | 5 | 0 | - | 2,081 |
| Donald J. Trump | 5 | 0 | 3.33 | 2,065 |
| Communes de Suisse | 7 | 0 | - | 1,994 |
| Germany | 9 | 0 | 4.50 | 1,884 |
| Decoder Quizzes | 7 | 0 | - | 1,882 |
| 100 Questions about … | 6 | 0 | - | 1,793 |
| US State General Knowledge | 11 | 0 | - | 1,620 |
| Islands! | 17 | 0 | 4.00 | 1,602 |
| Gassu Quizzes | 8 | 0 | 4.38 | 1,549 |
| Oceania Quizzes | 5 | 0 | 4.77 | 1,428 |
| France | 8 | 0 | - | 1,235 |
| Countries by a Single Word | 6 | 0 | - | 1,232 |
| New Zealand Quizzes | 15 | 0 | - | 1,175 |
| Spain | España | 7 | 0 | 5.00 | 1,094 |
| Physical Geography by Picture | 6 | 0 | - | 1,050 |
| Notable People by City | 6 | 0 | 4.86 | 1,002 |
| Bundesliga | 3 | 0 | - | 979 |
| Gassu's Tile Quizzes | 3 | 0 | - | 882 |
| Stoopid Quizzes | 2 | 0 | 4.67 | 771 |
| Gassu's City Trivia | 2 | 0 | - | 695 |
| JetPunk Quizzes | 6 | 0 | - | 651 |
| Interesting Facts | 3 | 0 | - | 646 |
| Animals | 2 | 0 | 4.36 | 595 |
| The 30 Greatest … | 8 | 0 | - | 498 |
| Cities as a Percent of the Continent | 5 | 0 | - | 469 |
| Europe's Largest [...]-Letter Cities | 3 | 0 | - | 444 |
| Country Details | 4 | 0 | - | 371 |
| Biggest European Cities by Letter | 6 | 0 | - | 359 |
| Most Guessed Things | 3 | 0 | - | 346 |
| Top 50 Largest European Cities | 1 | 0 | - | 344 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 344 |
| The Tesla Series | 4 | 0 | - | 337 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 324 |
| the Nordics! | 2 | 0 | - | 320 |
| Analogies | 2 | 0 | - | 309 |
| Early History | 3 | 0 | - | 274 |
| The Pacific Ocean by Letter | 3 | 0 | - | 220 |
| Gassu's Discord Quizzes | 4 | 0 | - | 182 |
| 21st Century in ... | 4 | 0 | - | 163 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 109 |
| Random Tourist Attractions | 2 | 0 | - | 83 |
| Rumantsch | 3 | 0 | - | 40 |
