Principia Malefex RPG
A dark psychological horror RPG¸ where the horror comes from what the human characters do to each other. There are few monsters (and the characters won't often run into them)¸ there is little or no organised or identifiable opposition¸ and the characters often will not know whose side they are actually on. The system uses roll-under-skill on d20 and d200. Character generation is random-roll base attributes (modified by career choice)¸ and point-bought skills and bonuses. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim
Basic rules¸ 242 page leatherbound hardback with goldprint title and ribbon bookmark.