When it became clear that I wasn't going to have the opportunity to do any work on VR while at id software, I decided to not renew my contract.

Obviously, virtual reality is where I've placed my bet about the future and where the excitement is going. At this point, I could say it's almost a lock. It's going to be magical - it is magical - and great things are coming from that. Along the way, I was focused on the first-person shooters. I said we should go do something on mobile.

We were doing mobile games before the iPhone. We were doing free-to-play with 'Quake Live.' We wanted to do massively multiplayer stuff in the early days but didn't have the resources to do it.

John Carmack Quotes