
Maassen won two of the biggest comedy contests in the Netherlands in 1990, the Groninger Studenten Cabaret Festival(GSCF), and Cameretten. The GSCF jury was not pleased with the quality of the contestants that year, and gave Maassen the first prize, remarking he was the best of the year, but still not very good. In the following years, however, Maassen fame grew steadily, especially amongst students. Maassens style was based on stand-up comedy: Alone on stage, telling jokes and stories to amuse the public, without any musical support (a thing common for most Dutch comedians up to that point).
Theo Maassen

Najib Amhali: I Amhali
2016

Bert Kruismans: Ratrace
2008

Toon Hermans: One Man Show 1991
1991

Theo Maassen: Tegen beter weten in
2006

Hans Teeuwen: Industry of Love
2004

Yora Rienstra: Eerlijk Gezegd
2019

Urbanus: Het een oog in, het andere oor uit

Xander De Rycke: Houdt Het Voor Bekeken 2015-2016
2016

Emilio Guzman: Doen en Laten
2011

Lebbis: W2P
2005

Kommil Foo: Wolf
2008

Kommil Foo: Breken
2012