The original Blackmoor was published by Tactical Studies Rules (TSR) in 1975 in booklet form. Zeitgeist Games, where Arneson works, is producing an updated d20 system version of Blackmoor to be published by Goodman Games.
External Links
Blackmoor Homepage
" class="external">http://www.castleblackmoor.com
Zeitgeist Games
http://www.zeitgeistgames.com