From the publishers blurb: Grohog Clan is a Low - Mid Level scenario and not a full fledged adventure that can be used as a one-off or a side quest.... Simply put ... A band of Gnolls have made the area their new home and the villagers want theme taken care of.... Designed for use with Old School Essentials RPG by Necrotic Gnome This is also OSR - B/X Comapt.