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Coriolis: The Third Horizon vs Mothership

Compare Coriolis: The Third Horizon and Mothership side by side. See differences in complexity, dice, genre, cost, and more.

Coriolis: The Third HorizonMothership
GenreScifiScifi, Horror
Play StyleExploration, Atmospheric, Character-Driven, Faction Play, Ship-Based, Investigation, CinematicRules-Light, Deadly, One-Shot Friendly, Survival, Atmospheric, Low-Prep, Cinematic, Fast-Paced
Core MechanicRoll a d6 dice pool (attribute + skill + gear). Each 6 is a success. Pray to the Icons to reroll all non-successes, but doing so gives the GM a Darkness Point to spend on complications, NPC boosts, or cosmic threats.Roll d100 under stat/skill. Stress and panic mechanics escalate tension.
Diced6 dice poold100
ComplexityMediumLow
AccessibilityMediumHigh
CommunityMediumMedium
LicenseYear Zero Engine OGL3rd Party License
Cost$$$
PublisherFree League PublishingTuesday Knight Games
Year20172022
Best ForGroups who want sci-fi exploration with a Middle Eastern-inspired setting, ship-based campaigns, and a mix of trade, intrigue, and cosmic mystery.Terrifying sci-fi horror one-shots and short campaigns. Panic table creates unforgettable moments.
HighlightsSetting blends sci-fi with Middle Eastern mythology and Icon worship, Darkness Points create a GM resource that escalates over the session, detailed ship customization with five crew roles in space combat, ten factions provide a political backdrop for intrigue campaignsRules-light, well-regarded module library, panic system creates mechanical tension
ConsiderationsSpace combat uses a separate five-phase subsystem with added complexity, praying to the Icons is the only reroll mechanic and it always costs a Darkness Point, mystical powers chapter is brief compared to the setting and combat chapters, setting is tightly coupled — 36 star systems with specific lorePanic table can cascade and end sessions abruptly, limited long-campaign support in core rules, stress mechanics can feel repetitive over extended play