Since it's initial publication in 2000, Glorious Adventures in Science Loosely Involving Generally Historical Times (G.A.S.L.I.G.H.T.) has been the standard by which all other sets of rules for Victorian Science Fiction games are judged.
The G.A.S.L.I.G.H.T. Compendium includes all the material from four books:
G.A.S.L.I.G.H.T.,
Battles by G.A.S.L.I.G.H.T.,
Adventures and Expeditions by G.A.S.L.I.G.H.T.., and
To Be Continued… by G.A.S.L.I.G.H.T.
In addition The Compendium includes new rules for airship fleet battles and more detailed rules for aerial vehicles in G.A.S.L.I.G.H.T. or Battles by G.A.S.L.I.G.H.T..
The vehicle hit charts have been revised and combined, and there are specific vehicle hit results for walking, driving, flying, and legged vehicles.
The record sheets used during game play have been completely revised.
With the Compendium you can play Pulp and VSF games from the large battles, through skirmishes, to role playing. It's all here in one volume.
The GASLIGHT Quick Start Rules are a way to easily jump right into your first GASLIGHT game.
—description from the publisher