Cepheus Engine vs Traveller
Compare Cepheus Engine and Traveller side by side. See differences in complexity, dice, genre, cost, and more.
| Cepheus Engine | Traveller | |
|---|---|---|
| Genre | Scifi | Scifi |
| Play Style | Sandbox, Modular, Toolkit, Simulation | Sandbox, Simulation, Exploration, Deadly, Character Building, Faction Play |
| 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. | Roll 2d6 + skill + modifier ≥ 8 to succeed. Character generation is a mini-game. |
| Dice | 2d6 | 2d6 |
| Complexity | Medium | Medium |
| Accessibility | Very High | High |
| Runnability | High | Very High |
| License | OGL | Traveller Fair Use Policy |
| Cost | Free | $$ |
| Publisher | Samardan Press | Mongoose Publishing |
| Year | 2016 | 2022 |
| 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. | Hard sci-fi sandbox campaigns with trading, exploration, and realistic space travel. |
| Highlights | Completely free and OGL, comprehensive rules covering personal combat to starship design, fully compatible with classic Traveller material | Comprehensive sci-fi toolkit, lifepath character creation, detailed trade/travel systems |
| 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 | Lifepath character creation can produce unplayable results, subsystem rules are spread across multiple supplements, steep buy-in if using official sourcebooks |