  On a journey, a backpack is a perfect place to store and organize the
necessary provisions and tools. Similarly, carrying and managing items is a
central part of most digital games, providing significant prospects for the
player experience. Even though VR games are gradually becoming more mature,
most of them still avoid this essential feature. Some of the reasons for this
deficit are the additional requirements and challenges that VR imposes on
developers to achieve a compelling user experience. We structure the ample
design space of VR inventories by analyzing popular VR games and developing a
structural taxonomy. We combine our insights with feedback from game developers
to identify the essential building blocks and design choices. Finally, we
propose meaningful design implications and demonstrate the practical use of our
work in action.
