The Claim is the name for the Oseram tribal territory in Horizon Zero Dawn. The Claim is situated north of the Carja Sundom and west of the Banuk land of Ban-Ur. The land around Oseram settlements is often barren due to their constant need for timber.
Oseram settlements are independent political entities with clearly defined territorial holdings. As such, the Oseram are a tribe of loosely-confederated clans. The Oseram tribal capital is Mainspring.
While mentioned in-game, the Claim has yet to be heavily explored.