For some Reason it's linked to Steam VR?? I restarted my computer, made sure steam was closed and then started the game and it still launched Steam VR and if I exit Steam VR it exits the game, the game still displays on the screen but not in the Vive headset (not that I was expecting to, didn't figure it was a VR game) but that's a bit odd of a bug there..
Edit: So It was a UR4 issue I found out how to disable the auto VR Launch here
https://answers.unrealengine.com/questions/441149/...