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Cepheus Engine vs Mothership

Compare Cepheus Engine and Mothership side by side. See differences in complexity, dice, genre, cost, and more.

Cepheus EngineMothership
GenreScifiScifi, Horror
TagsSandbox, Toolkit, Ship-Based, Career-Based, Skill-Based, Random Character Creation, Random Tables, Exploration, Simulation, TacticalRules-Light, Deadly, One-Shot Friendly, Survival, Atmospheric, Low-Prep, Cinematic, Fast-Paced
Core MechanicRoll 2d6 and add the relevant skill, characteristic modifier and difficulty modifiers. A total of 8 or more succeeds. The margin above or below 8 is the Effect, which determines the outcome where the rules call for it.Roll d100 under stat/skill. Stress and panic mechanics escalate tension.
Dice2d6d100
ComplexityHighLow
AccessibilityVery HighHigh
RunnabilityHighMedium
LicenseOpen Game License 1.0a3rd Party License
Third-Party PublishingCommercial publishing allowed — Open licenseNot yet researched
Summary only, not legal advice. Check current terms before publishing.
CostFree$
PublisherSamardan PressTuesday Knight Games
Year20162022
LanguagesEnglish, Italian, FrenchEnglish
Best ForGroups who want interstellar sandbox campaigns built around trading or exploring aboard a shared ship.Terrifying sci-fi horror one-shots and short campaigns. Panic table creates unforgettable moments.
HighlightsCareer terms generate experienced characters whose skills and starting assets reflect their prior lives. Planetary trade codes modify cargo prices, giving merchants a reason to compare routes and markets. World and encounter tables provide the referee with material for an interstellar sandbox.Rules-light, well-regarded module library, panic system creates mechanical tension
ConsiderationsFailed career survival rolls kill characters by default, with an optional mishap alternative requiring referee approval. Damage reduces physical characteristics, weakening injured characters until they recover. Operating a ship requires tracking recurring expenses alongside its income.Panic table can cascade and end sessions abruptly, limited long-campaign support in core rules, stress mechanics can feel repetitive over extended play