D&D 3.0: Tales from Mystara
Classes: Half-Orcs prefer the Barbarian, Fighter and Ranger classes but they can be of any other class if the want to. Few Half-Orcs are Cleric, Wizard or Sorcerer.
Mystara Locations: The main country of the Half-Orcs is the Broken Lands but they are present in all the wilderness of all the other nations specially in borderline outposts were humans interact with orcs or in mayor cities were one race has the other race as a slave.
Social Class: Because of he stigma of been a mixed race, the Half-Orcs can never be of a Social Class higher than Wealthy/Untitled, any roll result higher must be lower to that social class level.