Call Of Cthulhu 7th Edition Cheat Sheet ((link)) -

While the core d100 system handles most checks, the 7th Edition introduced "Advantage/Disadvantage" mechanics similar to modern D&D, but with a distinct flavor.

A "Pushed Roll" is how you turn a boring failure into dramatic horror. call of cthulhu 7th edition cheat sheet

Forget D&D. A single gunshot can kill you. Combat should take 2 minutes, not 2 hours. While the core d100 system handles most checks,

half your maximum HP in one blow. This puts you at risk of dying if you fall to 0 HP. call of cthulhu 7th edition cheat sheet