Cepheus Engine vs Starfinder
Compare Cepheus Engine and Starfinder side by side. See differences in complexity, dice, genre, cost, and more.
| Cepheus Engine | Starfinder | |
|---|---|---|
| Genre | Scifi | Scifi |
| Play Style | Sandbox, Modular, Toolkit, Simulation | Tactical, Crunchy, Combat-Heavy, Character Building, Grid-Based, Heroic, Ascending AC, Space Opera, Ship-Based, Exploration |
| Core Mechanic | Roll 2d6 + skill level + characteristic modifier. Meet or beat 8 to succeed. Effect (margin above/below 8) determines degree of success or failure. Lifepath character creation with careers, skills, and mustering-out benefits. | d20 + modifier vs. DC. Three-action economy per turn. Four degrees of success. Cross-compatible with Pathfinder 2e. |
| Dice | 2d6 | d20 |
| Complexity | Medium | High |
| Accessibility | High | Very High |
| Community | Medium | High |
| License | OGL | ORC |
| Cost | Free | Free (ORC) |
| Publisher | Samardan Press | Paizo |
| Year | 2016 | 2024 |
| Best For | GMs who want a fully open, hackable classic sci-fi engine for sandbox campaigns — trade, exploration, and space combat without any IP restrictions. | Sci-fi fans who want Pathfinder 2e's tactical depth with plasma rifles and starships. Great for PF2e veterans looking for cross-compatible space adventure. |
| Highlights | Completely free and OGL, large third-party ecosystem, comprehensive rules covering personal combat to starship design, fully compatible with classic Traveller material | Free rules on Archives of Nethys, deep tactical combat, cross-compatible with PF2e, distinct class identity |
| Considerations | Dense 200+ page SRD with no setting or adventure content, lifepath character creation can kill characters before play, assumes GM comfort with sandbox prep | Steep learning curve, fewer classes and options than PF2e (still growing), tactical starship combat rules deferred to a future supplement with current rules being narrative only |