A list of Oculus Rift DK2 games and experiences is maintained, along with download links, at: http://www.theriftarcade.com/oculus-rift-dk2-supported-games/
As tests of the Oculus DK2 there are some excellent 3D immersive environments to try…
Undersea with Ocean Rift
In Flight with Combat Flight Simulator
Not yet functioning in Direct Rift Mode.
In Space with Solar System Explorer/Discovering Space and Titans of Space
Solar System Explorer had a name change to Discovering > Space… and a limited travel version was made available for demonstrations which allowed travel out to Mars… ahead of a paid release which will allow for further exploration…
Titans of Space – another good tour of the solar system and other stars (some enormous) in our galaxy…
Manoeuvre in your spacesuit around a high resolution model of the International Space Station (ISS) over Earth with high resolution NASA textures in VRSpacewalk.
You can experience a very busy Moonbase in a Gerry Anderson’s Space:1999 experience by Liam Goodison at https://share.oculusvr.com/app/space-1999-demo