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Mothership vs Stars Without Number

Compare Mothership and Stars Without Number side by side. See differences in complexity, dice, genre, cost, and more.

MothershipStars Without Number
GenreScifi, HorrorScifi
Play StyleRules-Light, Deadly, One-Shot Friendly, Survival, Atmospheric, Low-Prep, Cinematic, Fast-PacedSandbox, Exploration, Low-Prep, Faction Play, Tactical, Ascending AC, Vancian Casting
Core MechanicRoll d100 under stat/skill. Stress and panic mechanics escalate tension.2d6 + skill + attribute ≥ target for skills; d20 + modifiers for combat. OSR-inspired.
Diced1002d6 / d20
ComplexityLowMedium
AccessibilityHighVery High
CommunityMediumHigh
License3rd Party LicenseProprietary
Cost$Free / $$
PublisherTuesday Knight GamesSine Nomine Publishing
Year20222017
Best ForTerrifying sci-fi horror one-shots and short campaigns. Panic table creates unforgettable moments.Sandbox sci-fi campaigns with comprehensive GM tools for faction turns, sector generation, and adventure creation.
HighlightsRules-light, well-regarded module library, panic system creates mechanical tensionFree version is generous, comprehensive sandbox tools, faction system
ConsiderationsPanic table can cascade and end sessions abruptly, limited long-campaign support in core rules, stress mechanics can feel repetitive over extended playOSR combat can feel flat compared to modern tactical systems, B/X heritage means limited mechanical support for social or narrative play