Lords of Darkness is the name of two accessories for the fictional Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game.

[2] The book begins by discussing ways in which undead creatures' energy-draining attacks can be made less devastating to a player character (PC) by using alternatives to the usual level-draining effect.

The 192 page accessory details twenty-eight villainous groups, contains maps of evil strongholds, and includes new spells, feats, and magic items.

[2] Bambra felt that the quality of the adventures also varies greatly, and that while most are "fairly good", he continued "[a] few are so thin and underdeveloped that I wondered why they were included".

[2] He contended that the adventure dealing with zombies is "the worst of the lot", partly because the characters would be facing "opponents who are likely to stomp them into the ground", but called the mummies' tomb and the lich's lair "fine examples of the dungeon designer's art".

[2] He called the optional Horror Check rules "a laudable attempt to instill fear of the undead but not sufficiently developed to be effective", because "the system isn't integrated into the AD&D rules in a satisfactory manner, as characters will deteriorate to the stage where they are unable to function effectively—a situation contrary to the spirit of the game and more in keeping with the grim tone of Chaosium's Call of Cthulhu game".

[2] Bambra said the accessory "expands greatly on the background of undead in the AD&D game and provides a source of short adventure settings.

"[2] He also said it was a good resource in terms of "new necromantic spells" and "information on the ecologies of the undead", but concluded: "its lack of maps and the underdevelopment of some of its adventures make it a merely useful rather than essential item.