This is the first Rationale post. In these posts we’ll take the mechanics that I’m moving forward with and we’ll scrutinize the rationale behind them.
Today, we’re going to look at the Core Mechanic. By the Core Mechanic I mean the in game mechanism for determining success, and those other pieces that are tightly bound to it. For example, GURPS Core Mechanic is “roll 3d6 under skill”, D20’s Core Mechanic is “Roll 1d20 and add Skill”, and Fates Core Mechanic is “Roll 4dF and add Skill”. In each of those cases I’m over simplifying, but those are at least the core of the core mechanic.