Unique aspects of game design documentation development for massively multiplayer online role-playing game in virtual reality (VR) are considered. Relevance and problems of designing such games are discussed, existing approaches to creating and adapting documentation for VR are described, and also such key issues in VR as network interaction, immersion, interaction of players and non-player characters controlled by artificial intelligence are defined. A methodological approach to the construction of a game design document for games of this genre is proposed, using the example of a technical specification of several games with a focus on structuring and standardizing the document. Future directions are discussed, including form-mal descriptions of game logic for scene portability, perspectives on auto-automated VR porting, and tools for auto-generation. Finally, the importance of standardizing technical specifications is emphasized and directions for further research are suggested.