Imagine playing a game that has you on edge--something scary, such as The Brookhaven Experiment--and having someone tap on your shoulder to get your attention. The effect can be jarring, and it will likely get your heart pumping pretty hard. Fortunately, Valve has thought of this and has come up with a solution for Steam VR users.

The company launched a new feature called “Knock Knock” with the most recent beta build of Steam VR, which will allow people in the real world beside you to get your attention without giving you a heart attack. With the press of one button, Knock Knock will send a quick alert to whoever is inside the headset. It appears on screen the same way that regular Steam messages pop up; messages appear at the bottom of the player’s field of view. You have to look down to read the message.

Virtual reality hardware is now in the hands of consumers, but we’re a long way away from perfection. Developers are still figuring out how to best use the mechanics, and the hardware and platform designers are still figuring out best practices for comfortable VR experiences. You hear a lot about how VR requires low latency response and high framerates. And we’ve talked about the benefits (read: necessity) of low persistence displays. When you have all these pieces of the puzzle, it’s easy to get lost in the virtual world and forget about your real surroundings. That’s great for becoming immersed in the content, but when someone outside of VR wants your attention, it can be a problem.

To access Knock Knock, you will have to opt in to the SteamVR beta for now, but the feature will eventually make its way to the regular release channel. To opt into the beta, find SteamVR in the tools section of your Steam Library. Under the beta tab in SteamVR properties, select beta – SteamVR Beta Update and click Close. You don’t need a key for the beta.

Once SteamVR downloads the beta update, open it up and right click on the HMD icon. You’ll find Knock Knock directly above the Mirror mode option. When you click on it, a window opens up with the Knock Knock button. If someone wants to get your attention, they can simply click on that button.

Knock Knock is available now if you opt into the SteamVR beta.

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