The first publishers of Glorantha material.
- Their Gloranthan materials are:
- White Bear and Red Moon (later renamed as Dragon Pass
- Nomad Gods
- RuneQuest 1 (later revised as RuneQuest 2
- Balastor's Barracks
- Trolls and Trollkin
- Creatures of Chaos 1
- Apple Lane (Publication)
- Snakepipe Hollow
- Cults of Prax
- Plunder!
- Rune Masters
- Griffin Mountain (Campaign Book)
- Cults of Terror
- Borderlands
- Troll Pak
- Pavis: Threshold to Danger
- Big Rubble: The Deadly City
- RuneQuest Companion
- King of Sartar
- Wyrms Footprints
Their website is chaosium.com