Tiny Tina's Wonderlands has a total of six classes to choose from, all of which come pre-loaded with two Action Skills, a Skill Tree that you can explore through leveling up, and one Class Feat, which is a pre-determined passive ability that bolts to your chosen class.
Once you pass a certain milestone in the game, you will have the ability to access Multi-Class, meaning you can add another class and its skills to your existing one. In short, this means you can craft a hybrid of, say, a Graveborn and perhaps a Spore Warden. This will give you two Skill Trees to master, four Attack Skills to toy with, and two Class Feats to use.
You can activate a Class Feat by carrying out a specific command during the game. For example, the Brr-Zerker has the Class Feat known as Rage of the Ancients, which is activated whenever an Action Skill is used. Once activated, the Brr-Zerker becomes Enraged, which increases Frost Damage for a short time. The same rule applies to the other five classes in Tiny Tina's Wonderlands.
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