From the publishers website --> http://www.goodman-games.com/etherscope.html
In 1876, Harold Wallace discovered something that changed the world: Etherspace. The might of Victorian industry drove forward, breaking down the frontiers of technology. Steam engines became smaller, weapons became more powerful, and cybernaughtics replaced limbs lost in bloody imperial wars. Then mankind learned to step into Etherspace itself.
Now it's 1984. In this alternative world of out-of-control technology, Etherspace is the new frontier. Punk scope riders fight evil industrialists while occult investigators war against Etherspace demons. Mysterious System Agents lurk in the shadows as treasure hunters raid Lemurean ruins for lost secrets. Jack in, scope up, and get ready, because the options for an Etherscope game are endless!
Etherscope is a complete OGL role playing game containing everything you need to create a character, play an adventure, start a campaign, and explore Etherspace!