Forbidden Lore is an accessory for the 2nd edition of the Advanced Dungeons & Dragons fantasy role-playing game, published in 1992 by TSR.

[1] The product provides additional information for the Ravenloft setting, including "new spells, curses, secret societies, items, and psionic rules for campaigns visiting or running in Ravenloft".

[1] Gene Alloway reviewed the manual in a 1993 issue of White Wolf.

[1] He provided a positive review, stating that "a must for any Ravenloft adventurer or DM.

[1] DieHard GameFan said that "To be honest, unless you are a Ravenloft completionist like myself, this isn't a 'must have' set by any means.