[[Image:Spawn of Azathoth (1st Edition).jpeg|thumb|''1st Edition'']] '''Format:''' Softcover

…], [[Peter Schott]], [[Steffen Schuütte]], [[Michael Siefner]], [[Jan Cristof Steines]], '''Format(s):''' Softcover

[[Image:D20COC.png|thumb|''Call of Cthulhu (D20)'']] …s or Chaosium at this time. The reasons for this are unclear, though lack of revenue might be a cause.

…leplaying games or rules, but at least part of the content must assume one of these two systems. …ssued by Chaosium, and produced as a self-contained product (i.e, not part of a larger work like a magazine issue). For magazine articles, fan published