Call of Cthulhu vs When the Moon Hangs Low

Compare Call of Cthulhu and When the Moon Hangs Low side by side. See differences in complexity, dice, genre, cost, and more.

	Call of Cthulhu	When the Moon Hangs Low
Genre	Horror, Modern	Horror, Fantasy
Play Style	Investigation, Deadly, One-Shot Friendly, Atmospheric, Roleplay-Heavy, Mystery, Horror, Corruption, Skill-Based	Horror, Dark Fantasy, Corruption, Investigation, Faction Play, Tactical, Solo-Friendly, Mission-Based
Core Mechanic	Roll d100 equal to or under your skill percentage. Success tiers at half (Hard) and one-fifth (Extreme) of the skill value. Bonus and penalty dice adjust the tens digit. Failed rolls can be pushed for a second attempt at greater risk.	Roll a pool of d6 equal to the stat tied to the skill and count successes, with each die succeeding on 5–6 when Untrained, 4–6 when Trained, and 3–6 when Mastered. The number of successes must meet or beat a Difficulty Value set by the Gamemaster. Bonus and penalty dice adjust the pool. A penalty die that rolls 5–6 cancels a success. Opposed checks compare success counts instead of a fixed Difficulty Value.
Dice	d100	d6 dice pool
Complexity	Medium	High
Accessibility	High	Medium
Runnability	Very High	Low
License	Chaosium Fan Material Policy	Proprietary
Cost	$$	$$
Publisher	Chaosium	Isolation Games
Year	2014	2023
Best For	Investigation-driven horror where combat is deadly and sanity is fragile. Great for one-shots.	Groups who want gothic-horror monster-hunting and investigation on a contract-driven mission structure, where characters carry a permanent curse that escalates as they lean on their powers. Also supports solo or GM-less play through the built-in Lone Hunter rules.
Highlights	Tracking Sanity as a depletable score ties mental erosion to the fiction, so confronting cosmic horror mechanically wears characters down. The percentile skills resolve on a d100 roll-under, with Hard and Extreme bands at half and one-fifth of the rating. Bouts of Madness convert failed Sanity checks into temporary phobias, manias, or loss of character control.	Each of the twelve Marks grants a supernatural Boon paired with a Curse that advances a stage every time the hunter runs out of Resolve, so power comes bundled with an escalating personal cost. Influence earned by bluffing, charming, or intimidating a faction accumulates as a spendable resource that buys concrete favors from four rival powers, turning social play into a persistent currency. A full Lone Hunter mode replaces the Gamemaster's difficulties with a success-tier table and twist tables, letting the same character and dice run solo without a separate ruleset.
Considerations	The chase rules add a detailed positioning subsystem whose complexity outweighs how often it sees use. Character creation allocates points across a long list of skills, a slow first step for new players. In long campaigns the sanity spiral can strip a character of player control as madness accumulates.	A hunter's Mark is chosen at creation and can never be changed, locking in both its Boon and the eventual monstrous transformation the character is fated toward. The setting leaves its central mysteries, including the nature of the Bitter Sacrament and the buried ympir, deliberately unanswered for each Gamemaster to resolve or not. Most antagonists are Minions that never roll to Parry, Dodge, or Counterattack, so rank-and-file fights reduce to attackers rolling against a fixed number instead of opposed checks.