Girl Genius: Adventures In Castle Heterodyne offers a journey into a fantasy world with gas lamps. Players take on the role of Agatha Heterodyne, the lost heiress of a mad family, who sets out on a quest to reclaim her ancestral home, Heterodyne Castle. Her ultimate goal: to restore the castle to its former glory and establish herself as a True Heterodyne. However, standing in the way is a corrupted and insane AI controlling the castle, many deadly traps and the mysterious Zola Heterodyne.

To navigate the dangerous corridors, catacombs and kitchens of Heterodyne Castle, you will have to use your ingenuity and skill. At the workbench you can make the necessary tools, such as a grapple and a wrench. These tools are vital for exploring the castle's hidden secrets, solving puzzles, and overcoming challenges.

Engage in intense hand-to-hand combat or use explosive devices to defeat your opponents, strategically using the environment to your advantage. Agatha's loyal minion Dingbot plays a crucial role in the adventure, helping her reach tight places, dig under obstacles, and soar above danger. It also helps solve lock puzzles and operate complex lock mechanisms.