From publisher blurb:
This isn't your great-great-grandfather's London!
1879 is a roleplaying game set in the late Victorian era of an alternate history, with low-level magic, high-level adventure, and vast possibilities as the Age of Steam gives way to the Age of Electricity. The 1879 Gamemaster's Guide describes the game world in depth, with details of the alternate history of the game world Earth and of colonization in the Gruv. The Bestiary chapter provides descriptions, game mechanics, and artwork of creatures from Earth and the Gruv. Guidelines for story and campaign creation, suggestions for designing Adventure Point and in-character rewards for players, and advice for running an entertaining game deliver everything needed to be a successful gamemaster!
Onward!