GURPS - Steampunk

From their website:

"GURPS Steampunk won the Origins Award for Best RPG Supplement of 2000. Then it sold out! Now it's back in print in a new deluxe hardcover edition with the same great full-color cover art. Written by William H. Stoddard, this book combines the mood of cyberpunk with the setting of an alternate Industrial Age, where computers run on steam power, walking colossi stalk the battlefields, flying ironclads rule the skies, and science is the new frontier. It covers the real events, politics, and personalities of the Industrial Age, as well as the weird science that could have been created . . . vehicles, robots, airships, and more."

*this is the softcover edition