Only one Unique can spawn in any group of monsters, but will always have several Minions. Each different type receives different boosts to their stats, but all receive a large bonus to their life. Champion monsters come in a few different varieties: Champion, Berserker, Fanatic, Ghostly, and Possessed. A Champion monster almost always spawns in a group of 4-5 other champions. Most monsters will spawn in their normal version. These are Normal, Champion, and Unique/Super Unique.

There are three basic versions that nearly all monsters in the game can spawn as. A player can learn a great deal of things about a monster by hovering the mouse pointer over a monster and looking at the name.

Monsters appear randomly in the wilderness at various places, and are typically found in groups.