Packed with background lore, spare monsters and side-quest adventures, The Horned Rat Companion is a dense little book and a wonderful resource for GMs who are committed to playing through its accompanying campaign.
Framed as the “DVD extras” to go alongside the feature presentation of The Horned Rat, the Companion is a gloriously messy tangle of supporting elements that didn’t quite make it into the main book. With 15 different chapters squeezed into just 120 pages, it bounces from idea to idea like a skittering firework, offering everything from lore dumps on locations found in the campaign to a new tunnelfighting profession that would fit nicely into the campaign.