This project explores the use of serious games for sustainable design education. The intent is to provide a fun, abstract learning space with ‘rule of thumb’ performance feedback on design decisions. The target audience is first-year architecture and design engineering students, with the primary learning objective being to provide an engaging introduction to the integration of performance measures and qualitative evaluation, viewed from individual and collective perspectives. A secondary objective is to introduce students to the principles of parametric design, where multiple design iterations can be generated from associative geometry. The aim is to develop serious game environments that enable students to adjust design parameters for typical building configurations, with real-time feedback on design permutations and asynchronous qualitative feedback from their peers. The project can be thought of as a scaffolding application that introduces ISD principles in an engaging way, as a precursor to designing with professional parametric design and environmental simulation software.