Don’t expect Xbox One, Xbox 360, and PC multiplayer shooter Titanfall to add a virtual reality mode anytime soon. Speaking with GameSpot today at PAX East, producer Drew McCoy said he’s enthusiastic about virtual reality headsets like Oculus Rift and Sony’s Project Morpheus, but stressed that the results for a very vertical-oriented game like Titanfall could be sickening for players.

“I used to think there would be,” McCoy said about the potential for a Titanfall VR mode.

McCoy said Respawn has a few Oculus Rift development kits in the office, and that he even has one at home. He described VR tech as “really cool,” but not for a game like Titanfall.

“I don’t know that people are going to be able to keep their lunch down,” McCoy said. “Maybe in a titan because you’re stuck to that horizontal plane. But if you’re trying to wall-run and look down six stories, I think people are going to barf everywhere.”

“I think [VR] definitely has awesome uses; I don’t know that Titanfall is one of them,” he added.

Also in our interview, McCoy discussed the recently revealed single-player Titanfall prototype that Respawn created earlier on in development.

“It’ll be interesting to see people’s response because we did work on a single-player prototype before we decided what we were going to eventually make, and this was year’s ago,” McCoy recalled.

More information about the Titanfall’s single-player prototype will be available in journalist Geoff Keighley’s “Final Hours” Titanfall feature, though it’s not clear when that will become available.

“It will be interesting to see the Internet’s reaction of ‘Oh, look at that, they’ve got a single-player in their back pocket!’ No,no, no. We protoyped this tiny little thing [raises voice],” he added.

Respawn is supporting Titanfall with numerous and significant content updates, so might the studio revive this single-player mode some day? Don’t count on it.

“Probably not,” McCoy said. [Titanfall] was never envisioned as a solo experience.”

Today at PAX East, Respawn also officially announced Titanfall’s first expansion, called Expedition, and teased that new modes and features are coming to the game sometime down the road.