Gunilla Jonsson and Michael Petersén are Swedish writers and designers of role-playing games. They wrote the Mutant and KULT games while working for Äventyrsspel (Target Games) in the 1980s. They helmed their own game company, Ragnarök Speldesign, for a few years in the late 1980s. Personal life. Jonsson and Petersén ended up in the same group of role-players in 1981. They are married, and both work at the SF-Bokhandeln bookstore in Stockholm. They write for Perilous Worlds. Awards. Rollspelsdraken 2012. The ESFS Chrysalis Awards (Sweden) 2019 . Works.
https://en.wikipedia.org/wiki/Gunilla_Jonsson_and_Michael_Peters%C3%A9n