The Enemy Within Campaign

The Enemy Within campaign (commonly abbreviated to TEW) is a series of adventures for Warhammer Fantasy Roleplay (WFRP) and was originally published by Games Workshop in the late 1980s. The campaign has been widely praised by fans of WFRP, including being voted the best RPG campaign of all time by Casus Belli magazine. https://en.wikipedia.org/wiki/The_Enemy_Within_Campaign