Editing Basic Role-Playing (section)

== Rules system ==
''BRP'' is similar to other generic systems such as ''[[GURPS]]'', ''[[Hero System]]'', or ''[[Savage Worlds]]'' in that it uses a simple resolution method which can be broadly applied. It uses a core set of seven [[Ability score|characteristics]]: Size, Strength, Dexterity, Constitution, Intelligence, Power, and Appearance or Charisma. From these, a character derives scores in various [[Skill (role-playing)|skills]], expressed as percentages. These skill scores are the basis of play. When attempting an action, the player rolls percentile dice to attempt to get a result equal to or lower than the character's skill score. Each incarnation of the ''BRP'' rules changed or added to the core ideas and mechanics, so that games are not identical. For example, in ''Call of Cthulhu'', skills may never be over 100%, while in ''Stormbringer'' skills in excess of 100% are within reach for all characters. Scores can increase through experience checks, the mechanics of which vary in an individual game.

The system treats armor and defense as separate: the act of parrying is a defensive skill that reduces an opponent's chance to successfully land an attack, and the purpose of armor is to absorb damage.

In most ''BRP'' games there is no difference between the player character race systems and that of monsters or other opponents. By varying ability scores, the same system is used for a human hero as a troll villain. This approach allows for players to play a variety of nonhuman species.