Check out SUBTLE FLUID ☉ nanotechnology for Stillfleet and other RPGS, the Zinequest 2021 submission from Stillfleet! This 37-page zine features a playable class, tons of rules, items, character backgrounds, two complete mini-ventures, and so much amazing art by Ethan Gould. Seriously, the art is so good:

Don't you want to wear this witchsuit?

Take a dip in a cryopreserving nanite bath! (For five thousand years...)

The concepts here are suitable for any sci-fi RPG, but the rules are specific to Stillfleet (with thoughts on conversions for d20). For more on Stillfleet, download the Quickstart Rules (pay what you want)! We're playtesting the game all the time on Discord.