ALIEN RPG vs Cepheus Engine
Compare ALIEN RPG and Cepheus Engine side by side. See differences in complexity, dice, genre, cost, and more.
| ALIEN RPG | Cepheus Engine | |
|---|---|---|
| Genre | Scifi, Horror | Scifi |
| Play Style | Horror, Survival, Deadly, Atmospheric, One-Shot Friendly, Gritty, Licensed IP | Sandbox, Modular, Toolkit, Simulation |
| Core Mechanic | Roll a d6 dice pool (attribute + skill). Each 6 is a success. Stress adds extra dice — better odds, but stress dice that roll 1 trigger panic. Push rolls to reroll failures but gain stress. Cinematic mode for one-shots, Campaign mode for long-form play. | 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. |
| Dice | d6 dice pool | 2d6 |
| Complexity | Medium | Medium |
| Accessibility | High | High |
| Community | Medium | Medium |
| License | All Rights Reserved (20th Century Studios license) | OGL |
| Cost | $$ | Free |
| Publisher | Free League Publishing | Samardan Press |
| Year | 2025 | 2016 |
| Best For | Sci-fi horror campaigns and one-shots in the Alien universe, with a stress/panic system that mechanically drives tension. Supports both deadly cinematic one-shots and long-form campaign play. | GMs who want a fully open, hackable classic sci-fi engine for sandbox campaigns — trade, exploration, and space combat without any IP restrictions. |
| Highlights | Stress and panic system mechanically reinforces horror tension, two distinct play modes (Cinematic and Campaign), Evolved Edition streamlines rules and improves layout, well-supported licensed setting | Completely free and OGL, large third-party ecosystem, comprehensive rules covering personal combat to starship design, fully compatible with classic Traveller material |
| Considerations | Tightly bound to the Alien IP with limited genre flexibility, stress mechanics can feel punishing at high levels, Evolved Edition changes are modest over 1st edition | Dense 200+ page SRD with no setting or adventure content, lifepath character creation can kill characters before play, assumes GM comfort with sandbox prep |