This document is a comprehensive design document for 'Pain Terminator', a virtual reality game designed to educate children on the mechanism of action of painkillers, specifically NSAIDs, within the human body. It outlines the project's concept, objectives, interaction design, and development process, including detailed descriptions of the game's physical and digital interactions, playtesting phases, and feedback. The document also discusses future plans for the game's distribution and potential applications in pharmaceutical marketing.