Cepheus Engine
SRDCore Mechanic
Roll 2d6 and add the relevant skill, characteristic modifier and difficulty modifiers. A total of 8 or more succeeds. The margin above or below 8 is the Effect, which determines the outcome where the rules call for it.
Best For
Groups who want interstellar sandbox campaigns built around trading or exploring aboard a shared ship.
Highlights
Career terms generate experienced characters whose skills and starting assets reflect their prior lives. Planetary trade codes modify cargo prices, giving merchants a reason to compare routes and markets. World and encounter tables provide the referee with material for an interstellar sandbox.
Considerations
Failed career survival rolls kill characters by default, with an optional mishap alternative requiring referee approval. Damage reduces physical characteristics, weakening injured characters until they recover. Operating a ship requires tracking recurring expenses alongside its income.
Third-Party Publishing
Reuse and adapt designated SRD rules under the OGL, excluding Samardan Press product titles and trademarks. Compatibility statements use the separate CSL.
Include the OGL, required copyright notices and identification of Open Game Content. The CSL requires trademark attribution and non-affiliation notice; modified standalone games need a cover disclaimer, and effectively unchanged copies cannot be sold under the CSL. Traveller settings and trademarks are not granted.