Girl Genius: The Works is a non-collectible card game that consists of several standalone decks of cards. You can play the game with any one of those decks, while also being able to combine some or all of those decks into a single deck for a longer game or a game with more players. Each deck contains many unique cards, but the gameplay is the same in all cases.

The Castle Wulfenbach deck has two large groups of unique cards: six Jagermonsters and seven Dingbots. The Jagers are troublemakers: They are all Soldiers, and they all pop one Soldier, so if you pop one of them, you just might get them all! But their second effects are not always so great: They include "Let another player draw a card from your score pile", "Let another player draw three cards from your hand", and "Put this card in another player's score pile."