"Girl Genius: The Works" is a strategic card game in which two or more players try to fix a "machine" and pop out pieces until one player wins. There are 108 cards in the deck, and 12 are played on a "board" at one time. The game is designed for ages 10 and up. The rules are available online as a PDF file.
People are characterized as "Hero", "Villain", "Construct" and other categories; Baron Klaus Wulfenbach's card was one of the first sure confirmations that he was indeed a construct. Mimmoths and dingbots are described as "Pests". Airships and submarines have descriptives such as "Cute" and "Perky".
As in the canon itself, historical characters are depicted in sepia-tone instead of full color. Some of the as-yet-unrevealed and tantalizing characters are Hilde the librarian (who is also described as a Queen), Spad Buckforth, General Cannonhat (though we have briefly seen ), and a few Skifandran-looking women.
"The Works" is long out of print and can be considered a collectors item. James Ernest and Cheapass Games produced it for the Studio.