KerbalVR
An add-on for Kerbal Space Program (KSP) to enable virtual reality
...This is a forever-WIP mod to allow the use of VR headsets in KSP. The primary focus is for flight control in IVA, but can also be used for room-scale viewing inside the VAB or SPH. IVA in VR puts you inside the cockpit of your craft. You can look around (and walk around if you have the physical space around you). Currently, it is possible to interact with cockpit instrumentation provided by the RPM mod (see note below); more immersive features for the cockpit may come sometime in the future. The goal is to replace the use of the keyboard and mouse entirely with interactive cockpit controls (buttons, switches, control sticks, throttles, etc.).