As I mentioned in What’s your MVB (Minimum Viable Bestiary)? I’m putting in one place my house rules (and a bunch of experiments) for Maze Rats. I’ve finally found the time to publish them in some form.
At the moment I have firearms rules, additional paths and some monster conversions (which I plan to expand in the next days - while I don’t know how often I’ll come up with extra rules).
I also plan for an Italian translation in the near future.
You can find it here (link preview is still work in progress, sorry): https://amazing-rats.oicn.icu