Weapon Proficiency skills are those which relate to the use of weapons. The subskills are divided not by what weapon is being used, but rather the mode of use; for instance, trying to hit someone with a halberd's blade would use WEAPON PROFICIENCY (POLEARM), while using the haft would use WEAPON PROFICIENCY (STAFF).

Increased skill with Weapon Proficiency increases chance to hit, the damage dealt, and the rate of attack.