Genestealer Cult Mode.
Think a combination of cult, revolution, alien, and wizard.
You have two starters. The Genestealer Patriarch, and the Genestealer Magus. If there are too many people, there would be some additional Genestealer Purestrains.
The Patriarch can infect people. This turns them into a genestealer hybrid. The Magus can do some robeless spells.
The hybrid has 4 stages, each taking a certain amount of time to get through. They can infect other people to shorten this amount of time.
First stage: Normal, other than the minor damage reduction and minor melee boost.
Second stage: Appears to have significant genetic damage. More decreased damage, and minor boosted melee. Can begin to infect others now.
Third stage: Even further "genetic damage" on examine, and also has a big fuckin' claw coming out of his back. Unable to wear outerwear like spacesuits. Further damage reduction, significantly boosted damage reduction. Does not breathe, has temp and pressure resistance.
Fourth stage: Genestealer Purestrain. These are untrackable on AI cameras.
The genestealers have a telepathic communication network.
The Patriarch is in charge, with the Magus as a second-in-command and infiltrator.
The Patriarch and additional purestrains start in the Maintenance vents.
The objective would be two-fold. Firstly, they must subvert the crew on the station (say half of them must be infected?) or kill a certain amount or position, as well as having a certain amount escape the station to continue the infestation.
What think?