Transformers: Hearts of Steel is a Transformers comic miniseries published by IDW Publishing that reimagines the Autobots and Decepticons arriving on Earth during the Industrial Revolution. The story blends steampunk aesthetics with classic Transformers conflict, featuring human characters and historical figures alongside iconic robots like Optimus Prime, Bumblebee, and Starscream. It is known for its alternate-history setting and distinctive Victorian-era technology.