Inspired by science fiction, steampunk is a genre that has a historical setting featuring steam-powered machinery, typically revolving around Victorian-era industrialism. While it might seem like a complicated theme to cover, many developers have done an amazing job at it, like Red Tiger in Wheel of Amp, Yggdrasil in Cazino Cosmos, Stakelogic in Money Track 2 and NetEnt in Steamtower, to mention a few.