This document contains notes on the mechanics of converting Call of Cthulhu 5th edition materials to Alternity. Rules design by Jim Clunie, Word design and formatting by Charles Borges.
This is a tool for GMs and not a complete game. Use of this conversion requires access to the fear, horror and madness check rules in James Wyatt's article "No One Can Hear You Scream" from Dragon #258. The Call of Cthulhu 5th Edition rulebook would be helpful.
This update converts the resource to PDF, adds several spell conversions, additional spell statistics, the term "correlation check" and various clarifications.
TerroX, rating: 84 January 21, 2001
Yeah this is the stuff! - too bad I do not own the Cthulhu RPG, but I love the novels and setting. (ok, who wants to go insane today?)
uncle_jimbo, rating: - June 10, 2001
Rather than bump the document up the list with yet another update, I'll mention a minor change here.
The Mythos-Related Mental Breakdown Chart (Sanity Loss to the rest of us) does not match the conversion of 15% CoC Skill = 1 rank Alternity skill. To fix it, cross out the words "Lose 1 rank in mental resolve" on table results before Sanity loss 3d10 (Ordinary) or 2d8 (Good-Amazing). Feverish Study does not cause loss of ranks in mental resolve. Reading the "Unausprechlichen Kulten" does not remove a rank of mental resolve on Ordinary success, but does do so on Good-Amazing success.
lordkrath, rating: 98 November 26, 2001
Very well conceived. If I played CoC I would be thrilled by it.
MindX, rating: 95 August 21, 2009
Goes great with DM!!
uncle_jimbo, rating: - September 11, 2009
I agree, actually. A dash of CoC concepts can go a long way to enhance the creepiness of Dark Matter.
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