GURPS Goblins, softback supplement for GURPS, by Malcolm Dale and Klaude Thomas
“Be Warned Gentle Reader This game deals with a variety of unpleasant subjects, such as burglary, prostitution, child abuse, leeching, alcoholism, the opinions of O.S. Fowler, piracy and venereal disease.
It is unsuitable for small children or persons of frail moral character.
The inclusion of this subject matter should not be taken to imply that the authors or publishers in any way support, condone, or propagate these things in life.”