Expedition to Castle Ravenloft
This release was an updated and expanded version of the original module for the D&D v3.5 ruleset in a 226-page hardcover. This returned the adventure to its roots stripping the demiplane setting of the Ravenloft campaign. This expanded version was designed to be able to run a mini campaign for about 20 sessions taking characters from level 6 to 10, with options for instead running long (8 session), short (4 session) or single session adventures.:17 It includes suggestions for incorporating the adventure into an existing generic, Forgotten Realms, Eberron or d20 Modern campaign, but makes no mention of using in a Ravenloft campaign setting.:19
Publication history 
Expedition to Castle Ravenloft was designed by Bruce R. Cordell and James Wyatt, and was published in October 2006. Cover art was by Kev Walker, with interior art by Dave Allsop, Kalman Andrasofsky, Ralph Horsley, William O'Connor, Lucio Parrillo, Anne Stokes, and Eva Widermann.