Blood Brothers is a light-hearted anthology of short adventures published by Chaosium in 1990 for the Lovecraftian horror role-playing game Call of Cthulhu.

The book is an anthology of thirteen short adventures that use themes, characters or monsters from classic B movie horror films: vampires based on Bela Lugosi's 1931 portrayal of Dracula; werewolves similar to Lon Chaney Jr.'s 1941 Wolf Man; zombies similar to those in George A. Romero's Dawn of the Dead; cavemen and dinosaurs from 1975's The Land That Time Forgot; gremlins akin to those in 1984's Gremlins; and a killer alien from 1979's Alien.

[1] The thirteen adventures were written by Keith Herber, Sam Shirley, Kevin Ross, Gregory W. Detwiler, Ben Monroe, Scott Clegg, Geoff Gillan, Barbara Manui, Chris Adams, Marcus L. Rowland, Tony Hickie, Michael Szymanski, Scott Aniolowski, and Fred Behrendt,.

[3] Wayne Ligon reviewed Blood Brothers in White Wolf #25 (Feb./March, 1991), rating it a 3 out of 5 and stated that "any supplement that includes Abbot and Costello as replacement PC's, has titles like 'Ancient Midget Nazi Shamans,' and recommends the infamous 'Dr.

"[4] In the November 1991 edition of Dragon (Issue #175), Allen Varney enjoyed the humour of the product, saying, "This supplement highlights a surprising and welcome turn in our hobby: the impish sense of humor in the field's leading horror game... that fine tap dance on the line between horror and comedy.