Soldak Entertainment - Hybrid Class System

Steven Peeler explains the hybrid class system in Soldak's upcoming "hardcore" dungeon crawler:

Change is becoming a common theme, and now it's time for the class system. In our upcoming dungeon crawl, we will have 6 main, fully fledged classes with 3 specialties, each offering 10 skills for a total of 30 unique skills for every class. So far this is similar to how our first game, Depths of Peril, worked. The major difference is that instead of picking a full class, you can choose a hybrid class!

The advantage and disadvantage of hybrid classes are one and the same- you choose any 2 specialties you want from the 6 main classes. You have a lot of freedom to choose any combination, however, you end up with less skills than a full class has (20 instead of 30). It's the penalty of pursuing two completely different specialties at the same time.