The Social Believability in Games Workshop intends to be a point of interaction for researchers and game developers interested in different aspects of modelling, discussing, and developing believable social agents and Non-Player Characters (NPCs). This can include discussions around behaviour based on social and behavioural science theories and models, social affordances when interacting with game worlds and more. The intention is to invite participants from a multitude of disciplines in order to create a broad spectrum of approaches to the area.