2012 · ソースブック（プレイを拡張するルール／オプション）
Investigator Weapons, Volume 1: The 1920s & 1930s
A reference guide to weapons used by investigators and cultists during the 1920s and 1930s. It covers handguns, rifles, shotguns, submachine guns, machine guns, flamethrowers, melee weapons, explosives, and special ammunition, with illustrated descriptions, variants, operating details, common malfunctions, film appearances, and game statistics. The book also gathers rules for injury, environmental conditions, and firearms combat, alongside optional rules for expanded play. Guidance includes typical weapons for non-player characters and cultists, the effects of magic on firearms and ammunition, and how gunfire affects Mythos creatures.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）ランダム属性生成（キャラクター作成時）
無料・Web、Android、iOS対応
LudoyaでInvestigator Weapons, Volume 1: The 1920s & 1930sを遊ぼう
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。