Call Of Cthulhu - D20 Core -

: Systems for translating characters between the d20 engine and Chaosium’s Basic Roleplaying (BRP) system. Critical Legacy

: Borrowed from Chaosium’s original version, this mechanic tracks the mental erosion of investigators. As characters encounter cosmic truths, they risk temporary or permanent madness, emphasizing that knowledge is more dangerous than physical wounds. Call of Cthulhu - D20 Core

: Unlike the hit-point cushions found in other d20 titles, this edition features "Massive Damage" thresholds that make even low-level threats potentially fatal. : Systems for translating characters between the d20