1.Download and install free Visual Studio Community 2015 Download Visual Studio Tools - Install Free for Windows, Mac, Linux with UE4 extensions Setting Up Visual Studio for Unreal Engine | Unreal Engine Documentation
2.Login to GitHub and download latest version of Oculus UE4 branch https://github.com/oculus-vr/unrealengine
3.Unzip, run Setup.bat
4.Once done, run GenerateProjectFiles.bat
5. Load the project into Visual Studio by double-clicking on the UE4.sln file. Set your solution configuration to Development Editor and your solution platform to Win64, then right click on the UE4 target and select Build. It may take anywhere between 10 and 40 minutes to finish compiling, depending on your system specs.
6. That’s it. You have now a fresh copy of Oculus UE4 branch. To open it, you can go to /Engine/Binaries/Win64/UE4Editor.exe or through Visual Studio by setting your startup project to UE4 and pressing F5 to debug.