Dice-Rolling Mechanisms in RPGs Torben Mogensen email:
[email protected] March 28, 2006 Abstract Most RPGs (role-playing games) use some sort of randomizer when resolving ac- tions. Most often dice are used for this, but a few games use cards, rock-paper- scissors or other means of randomization. There are dozens of different ways dice have been used in RPGs, and we are likely to see many more in the future. This is not an evolution from bad methods to better methods – there is no such thing as a perfect dice-roll system suitable for all games (though there are methods that are suitable for none). But how will a designer be able to decide which of the existing dice-roll method is best suited for his game, or when to invent his own? There is no recipe for doing this – it is in many ways an art. But like any art, there is an element of craft involved. This paper will attempt to provide some tools and observations that, hopefully, will give the reader some tools for the craftman- ship involved in the art of choosing or designing dice-roll mechanisms for RPGs. 1 Introduction Ever since Dungeons & Dragons was published in 1974, randomization has, with a few exceptions, been a part of role-playing games. Randomization has been used for creating characters, determining if actions are successful, determining the amount of damage dealt by a weapon, determining encounters (“wandering monsters”, etc.) and so on. We will look mainly at randomizers in action resolution – the act of determining how successful an attempted action is.