S.H.A.D.O.W. over Scotland (1986)

From the back cover:

"Your destination si a sleepy little village on the northeastern coast of Scotland. Just off shore, an ancient, haunted, castle sits on its own island. Many of the houses and cottages sit abandoned, and the townspeople that remain move about motivated by something more powerful than the fear of God. They talk in hushed tones of a series of unsolved murders an disappearances. Some actually believe the rumors of werewolves and vampires! Have you accidentally slipped into the 17th century? No, you've stepped into spine-tingling Danger International action.

S.H.A.D.O.W. over Scotland comes with 8 pages of layouts, and lots of NPC descriptions for plenty of mystery/horror adventure!"