The first publishers of Glorantha material.
- Their Gloranthan materials are:
- White Bear and Red Moon (1975, later renamed as Dragon Pass)
- Nomad Gods (1977)
- RuneQuest 1 (1978, later revised as RuneQuest 2)
- Balastor's Barracks (1978)
- Apple Lane (Publication) (1978)
- Snakepipe Hollow (1979)
- Cults of Prax (1979)
- Plunder! (1980)
- Runemasters (1980)
- Griffin Mountain (Campaign Book) (1981)
- Cults of Terror (1981)
- Borderlands (1982)
- Troll Pak (1982)
- Pavis: Threshold to Danger (1983)
- Big Rubble: The Deadly City (1983)
- RuneQuest Companion (1983)
- King of Sartar (1992)
- Wyrms Footprints (1995)
- Their website is chaosium.com