I’ve been working on a hack of Call of Cthulhu by Chaosium that is backward compatible but also simpler and a bit more reasonable than their 7th Edition system. Meaning no offence, there’s just some redundancy there. Then I decided to use a version of the Stress system from Mothership as a more interesting way to handle Sanity damage. A few more tweaks, and there you have it. I have a character sheet, a character creation worksheet, and a rules reference for the reworking of the rules. I’ve run it past one veteran CoC Keeper who liked it, and it’s what I’ll use next time I run Call of Cthulhu. Here you go! Enjoy. As always, comments welcome.
These are unfinished, and not near publishable, even if I could publish them, but as notes you could use them to run a Call of Cthulhu game, including a published campaign almost exactly as written.