Sony has announced its VR headset, called Project Morpheus, at the Game Developers Conference in San Francisco, but one of the larger surprises in the evening was the fact that the CCP-developed, and Oculus co-published title EVE Valkyrie would be playable on the hardware.

It's rare to see a game published by one platform holder be used in the marketing of another, but it seems as if Oculus' publishing deal was only for the PC.

"We partnered with Oculus VR to bring EVE: Valkyrie exclusively to the Oculus Rift on PC and we are thrilled to be working with Sony to bring EVE: Valkyrie to the PS4 with Project Morpheus," a CCP spokesperson told Polygon. We reached out to Oculus for comment, and have yet to hear back.

EVE: Valkyrie is a multiplayer action game that exists in the universe of EVE Online. It was designed specifically for virtual reality, and has often been shown on different versions of the Oculus Rift hardware. Sony's confirmation of Project Morpheus follows months of rumors, and the company announced that the hardware will be playable at GDC.

We'll have more Oculus and Project Morpheus news from GDC throughout the week.