Orcs are a species of aggressive humanoid carnivores that band together in tribes and survive by hunting and raiding. Orcs believe that in order to survive they must expand their territory, and so they are constantly involved in wars against many enemies: humans,elves, dwarves, goblins, and other orc tribes.

Orcs can be found in almost all locales of the Flanaess, but are most heavily concentrated in the Pomarj, the Empire of Iuz, the Bone March, and North Kingdom. There is also known to exist a great orcish city known as Garel Enkdal in the Griff Mountains. The orcs of the Baklunish nation of Zeif are very different from their brethren, having very nearly been assimilated into human society, though they are still regarded as lower-class.

Orcs typically organize into warlike tribes. Tribal rivalries are often severe, and tribes will only cooperate if controlled by a very strong leader. The largest orc tribe is the Skullcrush Tribe. Other major orc tribes include the Bloody Head, the Broken Bone, the Death Moon, the Dripping Blade, the Evil Eye, the Leprous Hand, the Rotting Eye, the Vile Rune, and the Dazark of the Fellreev Forest. Orcs usually spend their time planning raids and honing their combat skills when not warring with other creatures.

Orcish society is patriarchial. Females are typically regarded as property, though an individual's status may vary from chattel to prized possession. Males take pride in the number of females owned and the number of sons they sire. Battle prowess, territory, and wealth are also signs of status in orc society. Battle scars are worn proudly, and ritual scarification is practiced to mark great achievements and significant turning points in an orc's life.

Orcs typically worship the orc pantheon, led by Gruumsh.

Half-orcs are the result of usually unfortunate pairings between humans and orcs. They are universally looked down on, though they are prized workers due to their natural strength and athleticism. Not many people trust half-orcs, as their orcish features are terrifying to those who have ever encountered orcs. However, half-orcs are usually a proud people, and they search out worthwhile companions who can overlook their beastly features.