The document describes the ELEKTRA project, an EU-funded serious game designed to teach physics and optics to students aged 12 and up. It discusses ELEKTRA's design methodology, which was based on neuroscience, pedagogy, psychology and cognitive science, and involved an 8-phase process including defining learning objectives, developing scenarios and technology, testing, and evaluation. The methodology aimed to ensure ELEKTRA achieved its goals of being an engaging, adaptive, and effective learning tool.