Why is this big news? Well, it's one of only a handful of VR headsets that will be compatible with Half-Life: Alyx, one of the most eagerly anticipated games of 2020. Its release on 23 March means gamers will have to move quickly to get everything they need.

In addition to the tweet above, Valve sent a message to Steam users who have expressed an interest in the headset, adding that "all purchases beyond this initial quantity will be fulfilled in the order in which they are received, as supplies increase over the coming months."

In other words, you're unlikely to get the headset before Half Life: Alyx is released unless you move quickly this evening. While the game is also compatible a number of other VR headsets, 

Like much of the tech industry, Valve has been hit with supply chain issues as a result of the coronavirus. The limited stock it currently has will go on sale today, but such is the demand they are expected to sell out in a matter of hours. 

Head to the Valve Index page on Steam from 6pm today to secure your headset. 

While this isn't the only headset that will be compatible with the game, there are expected to be some features exclusive to Valve's hardware. Read more in our dedicated guide to what you need to play Half Life: Alyx