If you're planning a Victorian or Steampunk based game, then the industrial assets pack from amazing artist Eyefly, are a great place to start. Focusing on the industrial era, the pack contains ornate platforms, walls, walkways, brass vats, wild machines and much more.
What's more, is that a number of the assets are animated, so you can fill your world full of pumps, pistons, switches and loads more!
You can easily build factory interiors, create complex walkways and link multiple levels. Build mighty pipe networks, and attach animated cogs, valves and other props to really bring your industrial dream to life.
https://store.steampowered.com/app/2873400/GameGuru_MAX_Steampunk_Booster_Pack__Industry/
Dream it! Build it! Play it!