I've begun thinking a little about doing my first Halloween adventure since my old H.G. Wells game had one.
Here's the beginnings of it - the setup. Still working on how to develop it fully.
The basic idea is that centuries ago a Borg vessel got lost in a wormhole and crashed on a primitve planet in the Alpha Quadrant. These primitive Borg lack the magic nano-probes seen in post-First Contact Borg.
So these Borg went into stasis in the arctic regions of this primitive workd.
Fast-forward a few centuries. The world now has a technology like that of early-Industrial Revolution Earth. A scienctist has found the Borg and brought them back to his lab-or-a-tor-y. The Borg finally awoke and have been working with the mad scientist to make more Borg. Though lacking their advanced technology, their ability to assimilate others is like something out of Frankenstein - patching together corpses and injecting them with a "spark of life" - i.e. the old elevator going up the tower to catch a lightning bolt... The Borg are also using this steam-based technology as best they can in the hopes of building a subspace beacon to get in touch with the modern Borg.