How good does humans armed with trench guns and mining helmets plumbing ancient high-tech ruins alongside psychic cats, fire magic-wielding phoenixes, hulking robots, and other exotic creatures sound to you
Also, I'd like to mention that, about 10 years ago I considered a setting for a GURPS game that featured sapient psychic spiders (playable, of course, and with hats).
How good does humans armed with trench guns and mining helmets plumbing ancient high-tech ruins alongside psychic cats, fire magic-wielding phoenixes, hulking robots, and other exotic creatures sound to you
Sounds rather fine.
A major issue might be with scheduling and the format (voice, PbP (in which case scheduling would likely not be an issue), something else?).
Will probably do text rather than voice. Scheduling... will depend on a lot. We'll see how it shakes out. I'll DM you once it's closer to being ready.
Also, I'd like to mention that, about 10 years ago I considered a setting for a GURPS game that featured sapient psychic spiders (playable, of course, and with hats).
That's adorable.