There are 16 classes in Trove.
Classes are divided into two types:

also classes differ in firing range, difficulty and type of weapon.

The hardest to unlock vanguardian class in game.

Classes belong to a certain biome, but there are also “roamer” classes.
Classes unlocks can be crafted in chaos crafter station, vanguardian can be only crafted in resistor workbench.
Classes can also be bought for credits in the store or opened using the class coin.