SIVARG, short for Spatial Interaction in Virtual/Augmented Reality and Games is a new workshop to be hosted at ISS 2016 in November. The theme of the workshop is spatial and 3D interaction in highly fidelity graphical interactive systems, especially video games and virtual or augmented reality systems (or combinations thereof). Topics will cover all aspects of interaction in these systems, including input-related issues such as efficient control mappings, spatial input device features (e.g., low latency, input noise, etc.), as well as output-related issues such as display hardware features (e.g., stereoscopic rendering, head-tracking), and information visualization (e.g., game HUDs for status information). We solicit both position papers, as well as papers including at least preliminary studies on issues in these areas.