Creatures are the inhabitants of the game world. Many types of creature only spawn in certain areas, but they may be found wandering far from their home. All creatures (save merchants and priests) have hit points and can be damaged and killed. There are currently 42 types of creatures. Creatures with the [B] tag are dungeon bosses. Creatures with the [S] tag are non-moving NPCs that sell items. Creatures with the [D] tag are creatures that you find in dungeons only. The [N] tag means the creature only spawns at night. Notice that [B] tag include [D] tag (There is normally no boss walking around the Islands, save the Bandit Leader and the Elder.
Most creatures have a drop list, which is a set of items that creature has a chance of dropping. When it dies, one item is chosen from this list to be dropped to the ground. Certain tougher creatures drop 2-4 items. Bosses always drop 3 or more items.
A-Z:
Commander [B] [D]
Crypt warden [D]
Dwarf Warrior
Dwarf Merchant [S] [D]
Gnarl
Great Gnarl [B] [D]
Grass Scamp
Hawk
Knight
Mage
Magic Merchant [S]
Master Assassin [B] [D]
Melee Merchant [S]
Pharaoh [B] [D]
Priest
Prisoner
Ranged Merchant [S]
Ruler [S]
Rat
Sand scamp
Snow Scamp
Tool Merchant [S]
Warrior
Snoovir
Elder [B]