| Series | # | | Rating | Takes |
|---|
| Länder, die mit … beginnen | 20 | 20 | 4.72 | 1,157,466 |
| Quizzes mit Karten | 39 | 36 | 4.73 | 953,781 |
| Deutschland | 36 | 31 | 4.64 | 728,067 |
| Länder | 48 | 47 | 4.60 | 608,052 |
| Fußball-Quizzes | 20 | 13 | 4.34 | 550,131 |
| Gassu's SVG Quizzes | 45 | 9 | 4.61 | 459,745 |
| Quizz français de Gassu | 17 | 12 | 4.54 | 428,611 |
| Geschichts-Quizzes | 50 | 48 | 4.49 | 340,298 |
| Antworten sind europäische Länder | 17 | 16 | 4.71 | 279,496 |
| Flaggen-Quizzes | 11 | 11 | 4.70 | 262,115 |
| The Only ... | 5 | 2 | 4.58 | 209,801 |
| Politik-Quizzes | 15 | 13 | 4.54 | 198,325 |
| die deutsche Sprache | 15 | 11 | 4.25 | 180,416 |
| Geographie nach Buchstabe | 25 | 25 | 4.34 | 169,738 |
| Name a Valid Answer | 4 | 3 | 4.54 | 163,322 |
| 5 pro Kontinent Quizzes | 6 | 6 | 4.68 | 161,893 |
| Allerlei | Sonstiges | 13 | 13 | 4.45 | 142,765 |
| Bilder nach Buchstabe | 25 | 25 | 3.82 | 140,002 |
| United States Politics | 18 | 1 | 4.28 | 138,946 |
| Which City in ... | 3 | 3 | 4.45 | 138,684 |
| Sport-Quizzes | 11 | 9 | 4.32 | 138,658 |
| Die größten Städte | 15 | 13 | 4.45 | 128,564 |
| Countries by Picture | 13 | 6 | 4.35 | 127,400 |
| Gewässer-Quizzes (+ Inseln) | 15 | 15 | 4.49 | 125,301 |
| Sprachen | 13 | 12 | 4.53 | 110,592 |
| Antworten sind Städte | 16 | 14 | 4.28 | 110,359 |
| Bild-Quizzes | 23 | 20 | 4.31 | 99,571 |
| Geschichte nach Buchstabe | 25 | 25 | 4.35 | 93,278 |
| Religion | Mythologie | 12 | 12 | 4.36 | 86,183 |
| Länder / Städte mit Hinweisen | 14 | 13 | 4.59 | 81,903 |
| Meistbesuchte Länder von ... | 8 | 7 | 4.72 | 74,397 |
| Länder Trivia | 14 | 14 | 4.45 | 69,580 |
| Regionen, Provinzen etc. | 11 | 10 | 4.56 | 65,519 |
| Wikipedia Quizzes | 5 | 2 | 4.28 | 65,120 |
| Allgemeinwissen der Geschichte | 12 | 12 | 4.41 | 64,842 |
| Mathematik-Quizzes | 2 | 2 | 4.40 | 64,200 |
| Pruebas de Gassu en español | 7 | 7 | 4.35 | 64,066 |
| Von Nord bis Süd | 4 | 4 | 4.60 | 63,695 |
| Österreich | 6 | 6 | 4.78 | 55,193 |
| City Quizzes | 53 | 2 | 4.36 | 53,627 |
| Zusammengefügt! | 6 | 6 | 4.54 | 50,318 |
| A-Z Quizzes | 15 | 1 | 4.51 | 50,172 |
| Tourismus-Quizzes | 4 | 4 | 4.54 | 49,889 |
| 100 Longest Rivers by Continent | 6 | 1 | 4.91 | 46,806 |
| United States Cities | 34 | 1 | 4.52 | 45,107 |
| Achtung Abflug! | 4 | 3 | 4.72 | 44,195 |
| Polska | 2 | 1 | 4.88 | 40,626 |
| United States Geography | 23 | 2 | 4.28 | 40,222 |
| Hauptstädte - Karten-Quiz | 6 | 6 | 4.72 | 39,037 |
| Tier-Quizzes | 7 | 6 | 4.10 | 37,774 |
| Geographie A-Z | 7 | 7 | 4.37 | 36,800 |
| Schweiz | Suisse | Svizzera | Svizra | 7 | 6 | 4.63 | 35,405 |
| Gassu's Flag Quizzes | 3 | 1 | 4.64 | 35,376 |
| Wahrzeichen von Ländern | 4 | 4 | 4.84 | 34,522 |
| Gassu's Sports Quizzes | 29 | 1 | 4.17 | 28,827 |
| Antworten sind asiatische Länder | 4 | 4 | 4.47 | 27,195 |
| Gruppen von Dingen | 4 | 2 | 4.38 | 25,823 |
| Elemente (Chemie) | 2 | 2 | 4.70 | 24,256 |
| Personen nach Land | 5 | 5 | 4.49 | 23,196 |
| Monarchie | Royals | 3 | 2 | 4.50 | 16,728 |
| die 2010er | 6 | 4 | 4.47 | 16,373 |
| Geographie nach Anzahl Buchstaben | 2 | 2 | 4.61 | 14,220 |
| California | 5 | 1 | 4.40 | 13,753 |
| Gemeinden der Schweiz | 27 | 0 | 4.97 | 12,465 |
| italiano | 3 | 1 | 4.74 | 11,229 |
| It's All About Countries | 38 | 0 | 4.47 | 11,170 |
| 5 Cities by Continent by Letter | 26 | 0 | 3.75 | 10,533 |
| World's 50 Largest Cities | 9 | 0 | 4.47 | 9,226 |
| Städte-Trivia | 6 | 5 | 4.34 | 6,317 |
| Misc | 26 | 0 | 4.38 | 6,265 |
| Switzerland | 19 | 0 | 4.45 | 5,917 |
| Religion | 5 | 0 | 3.24 | 5,728 |
| Biggest Cities in the E.U. by Letter | 26 | 0 | - | 5,647 |
| Ereignisse nach Monat | 5 | 4 | 4.21 | 5,595 |
| Language Quizzes | 12 | 0 | 4.86 | 5,125 |
| Gassu‘s Geographic Groups | 4 | 0 | 3.80 | 5,020 |
| Historical Quizzes | 18 | 0 | 4.48 | 4,325 |
| Groups of Things | 6 | 0 | 4.25 | 3,985 |
| Communes de Suisse | 7 | 0 | - | 3,639 |
| Transportation | 12 | 0 | - | 3,119 |
| World Politics | 14 | 0 | 4.14 | 3,025 |
| Largest European Cities by Letter | 23 | 0 | - | 2,926 |
| Auckland Quizzes | 7 | 0 | 4.92 | 2,577 |
| the Britons and their Commonwealth | 5 | 0 | 4.89 | 2,571 |
| Answers are U.S. States | 11 | 0 | 3.95 | 2,323 |
| Italy | 5 | 0 | - | 2,307 |
| Five Biggest Cities by Region | 6 | 0 | 3.60 | 2,295 |
| Donald J. Trump | 5 | 0 | 3.57 | 2,219 |
| Germany | 10 | 0 | 4.50 | 2,126 |
| Decoder Quizzes | 7 | 0 | - | 2,016 |
| 100 Questions about … | 6 | 0 | - | 1,962 |
| US State General Knowledge | 11 | 0 | - | 1,799 |
| Gassu Quizzes | 8 | 0 | 4.38 | 1,737 |
| Islands! | 17 | 0 | 4.00 | 1,675 |
| Oceania Quizzes | 5 | 0 | 4.75 | 1,573 |
| New Zealand Quizzes | 15 | 0 | - | 1,377 |
| France | 8 | 0 | - | 1,375 |
| Countries by a Single Word | 6 | 0 | - | 1,313 |
| Spain | España | 7 | 0 | 5.00 | 1,225 |
| Physical Geography by Picture | 6 | 0 | - | 1,138 |
| Bundesliga | 3 | 0 | - | 1,112 |
| Notable People by City | 6 | 0 | 4.88 | 1,075 |
| Gassu's Tile Quizzes | 3 | 0 | - | 961 |
| Stoopid Quizzes | 2 | 0 | 4.67 | 861 |
| Gassu's City Trivia | 2 | 0 | - | 781 |
| Interesting Facts | 3 | 0 | - | 708 |
| JetPunk Quizzes | 7 | 0 | - | 690 |
| Animals | 2 | 0 | 4.36 | 618 |
| The 30 Greatest … | 8 | 0 | - | 533 |
| Cities as a Percent of the Continent | 5 | 0 | - | 491 |
| Europe's Largest [...]-Letter Cities | 3 | 0 | - | 455 |
| Biggest Cities in the NATO by Letter | 7 | 0 | - | 382 |
| Country Details | 4 | 0 | - | 382 |
| Biggest European Cities by Letter | 6 | 0 | - | 375 |
| Most Guessed Things | 3 | 0 | - | 375 |
| the Nordics! | 2 | 0 | - | 370 |
| Top 50 Largest European Cities | 1 | 0 | - | 360 |
| Biggest Cities in the Americas by Letter | 4 | 0 | - | 332 |
| Analogies | 2 | 0 | - | 332 |
| The Tesla Series | 2 | 0 | - | 236 |
| The Pacific Ocean by Letter | 3 | 0 | - | 230 |
| Gassu's Discord Quizzes | 4 | 0 | - | 190 |
| 21st Century in ... | 4 | 0 | - | 188 |
| Biggest New Zealand Cities by Region | 16 | 0 | - | 122 |
| Random Tourist Attractions | 2 | 0 | - | 86 |
| Rumantsch | 3 | 0 | - | 46 |
