Machine derived contents note: Introduction -- An Approach to Game Design -- The ̀What' and ̀Why' of Gaming -- Seeking an Appropriate Gaming-Simulation -- An Overview of the Design Process -- Setting Objectives and Parameters -- Model Development -- Decisions about Representation -- Questions of Style -- Decisions about Representation -- Questions of Form -- From Representation to Construction -- The Four Case Studies Continued -- Construction and Modification -- Preparing Your Gaming-Simulation for Use by Others