Adventure Calls. This supplement for Four Against Darkness adds plenty of optional rules: Guidelines for Troupe play; Rules for stealth, streetwise, banking, magic lockers, gambling and hidden treasure troves; New equipment and spells; New monster tables (riff-raff, ambushers, weird monsters, chaos cultists); Rumors, Scenes and Red Herrings; Nine new thematic dungeons; Rules for joining an Adventurers Guild; Tables for Guild Jobs and unique minor quests; Rules allowing you to play with 1 to 3 characters; Trinkets – six new minor magic items; A ready-to-Run hex-crawl campaign. This book requires only Four Against Darkness but also provides many interactions with other titles. D6, d10 and d12 are required to play.