When the Navy Walked: Earthin the Hollow Earth is a miniature rules set that covers an alternate history set in the center of the Earth. As the Great Powers begin to explore their newfound land of adventure they must contend with the locals that time forgot.

Now the Aztec Empire, the Holy Egyptian Empire, the Second Roman Empire, the Yuan Dynasty and the Protean Races must contend with the newcomers. How will the Great Powers add the awesome power of Earthin to their war machines? Will they harness the power of the dinosaurs or will the unpredictable wild beasts bring ruin to the civilized world?

WTNW is more than just a Victorian Science Fiction Game. It is a springboard for imagination and a high-level game of tactics and battles set amongst a 'what if' world inspired by the classic authors of Victorian Science Fiction and Retro Science Fiction. In WTNW, players take the reins and command massive armies of men, fantastic beasts and steam-driven vehicles of leviathan proportions. In the end, the thunder that cascades across the battlefield to settle in the souls of the fighting men will only be assuaged with the assistance of the landship.

This Earthin the Hollow Earth supplement is not a stand-alone game. You will require the full version of When the Navy Walked, Second Edition, to play the game. So grab your goggles and your Aethertech, and get ready for a good time filled with steam and adventure!