File used by Rune, a a third-person action game where players control a mythological character named Ragnarok; stores the 3D geometry for a game character or object; used for providing the skeletal structure to 3D world entities.

Example files in the Rune installation in the \Meshes\ directory are creatures.ums, objects.ums, plants.ums, Players.ums, and weapons.ums. NOTE: Rune uses the Unreal Engine 1 technology and therefore UMS files may be similar to meshes used by other Unreal Engine 1 games.