- "The Oseram believe in many things. The forge's hiss, the charcoal's crack, the creak of the fermenting barrel."
- ―Mournful Namman
The Oseram are a human tribe in Horizon Zero Dawn. They are known for their excellent metalworkers and craftsmen, and as such, are best known for their steel and powerful weaponry. They are more technologically advanced compared to the other tribes.
The tribe as a whole is made up of independent villages maintained by family clans. These clans are loosely united into a larger nationstate, although the day-to-day lives of Oseram are governed by his or her clan's ealdormen.
Each clan elects a council of ealdormen to provide governance to the tribe, although this is typically done on a case-by-case basis. Oseram citizens with requests for marriage or policy proposals for the village will wait in line for hours each day for an opportunity to pose their question to the ealdormen.
During the Red Raids, the Oseram were one of many tribes that fell victim to the Carja's brutal raids and sacrifices; however, they were able to put up a fight due to their armaments. The war with the Carja came to an end when the Oseram forged an alliance with Avad, the son of the Mad Sun-King Jiran, and mounted an attack on Meridian that resulted in the defeat of Jiran. The Oseram Vanguard played a major role in the liberation of the city.
Thanks to Avad's alliance, the Oseram can often be found in Meridian and elsewhere throughout the Sundom. Most Carja citizens appear uneasy about the increase in Oseram found in their cities.
The Oseram place a high value on independence and freedom of expression, making arguments a vital part of Oseram culture. Similarly, honesty is a key virtue and cheating or deceiving a fellow tribe member is considered a crime sometimes punishable by death.
The Oseram's greatest known cultural achievement is their practical craftsmanship, which many of their tribe, including Erend, can be heard boasting about. Their armors are claimed to be very resilient and their weapons are advanced and powerful despite their lack of the Old Ones knowledge, with some particularly notable examples being the Oseram Cannon which was key in defeating Jiran during the Liberation of Meridian. Other apparatuses, like sonic devices, safe doors, and voice recording devices are proof of their technological aptitude, which so far can only be surpassed by those bearing knowledge of the Old Ones. Their craftsmanship seems to contrasts sharply with the Carja, who stereotypically prefer an artistic approach, with members of the tribe remarking on the silliness of the Carja army's feathers and choice of machine parts.
The Oseram have a patriarchal society in which women are not permitted to own property; rather, according to Gera at Hunter's Gathering, they are treated like property. Women who wish to become soldiers must shave their heads.
- Elite Mercenary
- Mercenary Forgesmith
- Mercenary Gunner
- Mercenary Heav
- Mercenary Warrior
- Odund's Marvel Outlander
- Oseram Elder
- Oseram Freebooter
- Oseram Guard
- Oseram Outlander
- Oseram Worker
- Vanguard Regular
Known Settlements, Outposts, and Gates
- The Oseram make use of bynames, which are last names derived from occupation, gender, marital status, or familial relation. Examples include Petra Forgewoman and Olin Delverson.
- The Oseram's culture is loosely based on that of the Cossacks.
- Their clothing and architecture style, however, were original designs, conceived by determining how they would interact with their environment.
- Scrappersap, considered to be the finest Oseram brew, is derived from corn.