Ok, so my campaign is set in an area of space that has been cut off by warp storms for a couple thousand years, and the storms recently lifted. I am leaving it pretty open ended, letting the players go where they will.

I have a Space Marine chapter homeworld located in the area, and obviously that chapter has been cut off for years as well. Wondering what kind of endeavour you could see for the characters to establish relations with the chapter?

What does a space marine chaper need that the PCs can provide ? Answers to that question and you'll have your endeavours

Some things that come to mind :

* access to a pool of quality recruits

- find a suitable world (feral or death world make good candidates)

- locate and make contact with the locals, evaluate their suitability

- map a warp route to the marine's world

* provide rare materials to build/maintain their equipment

* track down and bring back some chapter relics, defectors, old outpost... basically something they would like to recover but don't have the time and manpower to do themselves

* establish a trade route for high tech hardware. Even if the capter's tech can keep their equipment working and produce some of it, odds are they can't do it all. That suppose making nice to the Mechanicus.

* get them some spaceships - they might be short in that department, and spaceships aren't something they're likely to have the ressources to build for themselves. Wether you link them with a yard, salvage some derelict/pirate ship or trade one your own ships is to be determined.

Manunancy, thanks for the ideas!

I was also thinking they would need new Astropaths, and the means to get potential Techmarines to Mars for training.

What kind of bonus to the profit factor should be?

I would say all of this would be lesser endeavor(s), and thereby +1 or +2 if the pc perform very well. After all, this trades are rather simple and not very dangerous.

You want a dangerous endeavour?

What if these marines aren't 100% codex?

What if these marines are a little under populated?

What if there were a mechanicus tithe ship they were aware of carrying a load of geneseed back for testing?

How interested in making a profit are you?