Valkyrie

A single meatspace universe with an untold number of virtual universes built in VR and accessible through subcranial brain-machine interfaces. The most well known of these virtual universes is Odyssey, which is a soft-scifi space-survival universe, populated by daring astronauts, adorable aliens, and enormous spaceships. Characters have also made references to a sword and sorcery virtual world that they have visited multiple times.