Call Of Cthulhu - D20 Core -

One of the book's most significant contributions is its extensive appendix for integrating Lovecraftian horror into standard D&D campaigns. It provides:

: Systems for translating characters between the d20 engine and Chaosium’s Basic Roleplaying (BRP) system. Critical Legacy 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. One of the book's most significant contributions is

: Stats for entities like Cthulhu and Nyarlathotep designed to challenge high-level d20 parties. Call of Cthulhu - D20 Core