I'm sitting here looking at five documents that form the basis of each species' main religion. The Tyrusin code of honor permeates everything in their society. Social, cultural, religious, political. Just about any decision a Tyrusin makes is effected by or has an effect on xe's honor. I've been using xe as a gender-neutral pronoun.
Some religions have one or none.
And of course some players will choose to ignore religions. They went through sixteen seperate belief systems in the last ten thousand currans. These days, there's a lot more 'postmodern' on the whole issue. All the gods have equal and very minor importance. From all sixteen.