Heavy Armor proficiency restrictions

No character class automatically gains the Heavy Armor proficiency. If a character wishes to have this feat they must purchase it with a feat slot.

This is because in the campaign setting heavy armor is fairly scarce, with most characters using medium or light armor. Only the dwarves had the craftsmanship to produce items of heavy armor, these pieces are scavenged by the goblinoid races and selectively adapted for use by the few have trained to wear it effectively in combat.