Cthulhu by Gaslight is a horror tabletop role-playing supplement, written by William A. Barton, with art by Kevin Ramos, and first published by Chaosium in 1986.

[3] Tim Wilson reviewed Cthulhu by Gaslight for White Dwarf #78, and stated that "Overall this is a good buy for anyone wanting an English campaign or as a challenge to those souls jaded by the Arkham countryside, and is recommended to those who appreciate sane game design.

"[2] The Games Machine reviewed Cthulhu by Gaslight and stated that "Thoroughly recommended for anyone who likes the idea of horror roleplaying in the footsteps of Sherlock Holmes.

"[6] In the June 1990 edition of Dragon (Issue 158), Jim Bambra thought that this book "perfectly captures the flavor and mood of the times, taking CoC into a previous age."

"[1] In a retrospective review of Cthulhu by Gaslight in Black Gate, John ONeill said "As much as I enjoyed Chaosium's other published adventures, there was just something about the 1890s England that perfectly suited the creeping horror of the game.