This game was published in a periodical issue. There is no distinct RPG Item for the game. The database currently does not have the functionality to link the periodical article presenting the game directly to this RPG entry; thus, the RPG entry remains with the periodical. The periodical, issue, author, and other salient details may be noted here in the description; interested users should refer to the periodical issue and article (if available) for complete details. If the game is released in some other format in the future, it can be listed as an RPG Item.
Call Of Cthulhu 5½ is published in The Unspeakable Oath (Issue 6 - 1992) as a series of articles that present an entire, though concise, game. The basic attempt of the game is to provide complete replacement systems for Call of Cthulhu 5th Edition to eliminate what the authors perceive as serious problems with that system. Most of the material is presented in a "modular" format such that users could pick and choose which rule elements they would like to use.
A revised character sheet, supporting the modified rules, also is provided.