Nope, they specifically released a Rift plugin for the Free version of Unity 4 just a few months ago. http://blogs.unity3d.com/2014/12/23/calling-all-vr-enthusi

Nope, they specifically released a Rift plugin for the Free version of Unity 4 just a few months ago. http://blogs.unity3d.com/2014/12/23/calling-all-vr-enthusiasts-target-the-oculus-rift-with-unity-free/ http://blogs.unity3d.com/2014/12/23/calling-all-vr-enthusias... With full lens correction that needs render-to-texture. Render-to-texture is still disabled in Unity 4 Free, but it is specifically allowed just for the Oculus plugin.