"It takes place in England around the late 1700's, a decade or two into the Industrial Revolution." - Ask IGA #2
Definitely some steampunk stuff in here!
Ooooo, late 1700s! That's SotN-era stuff, baby! Schweeet!
Some of that artwork of the dungeon/alchemy lab gives me CoD feels with the Innocent Devils(which also had that whole "crystal" theme going for them).
Looks like IGA's going to use the Lesser Key of Solomon/Goetian demons as a main theme, but also be open to pulling other mythologies into the mix(like CV). I hope, considering like CV, this is historically set in our world, there will be some references to various occult figures, like John Dee or Roger Bacon.