A party of Grey

[Bober]

Hello.
My players have asked me to run a new campaign, and they would like to play a group of Grey in it. Given the particular lore, I don’t feel like the usual campaign would fit in well. They are a mysterious race and have little to no contact with other races (other than kidnapping and probing).
I was wondering if anyone has run a similar campaign already, and if you guys have any tips on what I could have them do to make it fun.

If it was a one-shot it would have been much easier, but they don’t enjoy short adventures, which is why they asked me for a campaign.

I could really use your help on this. Ideas?

[Robert Gooding]

Their race is dieing and they are looking for a cure in the genetic code of other species, they have to stealthily abduct members of races they think will help their research, shenanigans ensue on inevitable failed stealth rolls and such

Later the campaign shifts as they find out that big pharmaceutical companies have a cure but make more money from the ineffective treatments than curing the disease so the players have to find a way to bring it to light, before it’s too late

[Dracomicron]

They finally find a race that has adaptable enough DNA for them to synthesize a needed protein, but it's an astrazoan (from Pact Worlds), and they are notoriously hard to find due to their natural shape changing.

They'll need to follow leads and craftily probulate potential astrazoans without alerting authorities.

Also there is an entire subculture on Absolom Station that is wayyyy into Grays, and the PCs can use a forgotten level of the Spike as home base when they're not on their ship, and use Gray groupie merchants and services.

[The Goat Lord]

My son plays a grey mystic, which was a replacement for his contemplative that was killed. He didn't want to create a backstory, so I offered to do so for him, as I often create side-adventures for the PCs at my table that are tied to their history, like the loyalty missions of Mass Effect 2. I suggested that his character have amnesia, and that we would peice his history together over time.

The story I came up with is that my son's grey was an undercover agent sent to infiltrate a cult of evil greys on Absalom Station. The evil greys are called Caretakers and the good greys are The Collective.

The greys come from an underground city on Akiton, but that isn't their true home. They believe they were created by another race and tasked with observing, dissecting, and studying the core races of the Pact Worlds. Due to the Gap, they don't know who created them or why. There was a schism among them, with the Caretakers choosing to remain evil and endeavor to takeover the Pact Worlds, while the Collective revealed their race to the Pact Wolrds and are petitioning for official recognition and status. Behind the scenes the two factions are at war, with the Collective working to bring to justice the evil greys that have secretly infiltrated the Syndicsguild.

While working undercover for the Caretakers, my son's character was captured, tortured, and mind wiped by the villain of an unrelated adventure, to later meet the other PCs. As the memories started to return, everyone was convinced that he was one of the evil greys, but he eventually learned the truth and ended up bringing down the Caretakers on Absalom Station.