Belle II in Virtual Reality is a free visualisation of the Belle II experiment, a particle detector at the KEK laboratory in Japan that studies the collisions of electrons with their antimatter partners, positrons. It was released on Steam on 5 March 2018 by a team from Virginia Tech, combining the university's Institute for Creativity, Arts and Technology, its Department of Physics and its School of Education. Virginia Tech is part of the international Belle II collaboration.

Inside the app you can walk through a model of the detector built from its real geometry and watch simulated collision events play out, with particles flying outwards through the detector's layers. Five events are built in, and more can be loaded from a folder. Besides SteamVR, it was offered free for Rift and Go through the Oculus Store, and the team also provides desktop versions for Windows, Mac and Linux and a browser version that need no headset.