Age of Steel is a tabletop roleplaying game (RPG) set in a world much like our own during the 1920s to 1930s. It is a world recovering from its first global war, a world in the twilight years of exploration and adventure, and a world on the brink of another devastating conflict. It is a time of innovation and advancement, as well as a time of chaos and conspiracy. An age when heroes must be as hard as steel.

Age of Steel has been inspired by a number of sources; movies such as the Indiana Jones series, The Mummy and National Treasure; the works of Raymond Chandler; the Uncharted and Bioshock video game series; the works of H.P. Lovecraft and the Hellboy comics and movie series.

It is also a game firmly rooted in the Dieselpunk genre of speculative fiction. Dieselpunk is a genre similar to Steampunk, but instead of the Victorian era, Dieselpunk is inspired by the 1920s to 1950s and features things such as rocket-packs, rayguns and machines that combine futuristic ideas with retro technology in a blend that never existed in our world.