Valve announced this on Twitter. Half-Life: Alyx will be free for owners of Valve Index headsets, and will also run on Oculus Eift, HTC Vive, Windows Mixed Reality devices. Alas, you won’t be able to play on PC without owning one of the VR headsets mentioned above.
Half-Life: Alyx will be a prequel to HL 2 and will tell the story from the perspective of Alyx Vance, who will organize resistance against the Alliance, while Gordon Freeman stays in a long-term stasis. Meanwhile, nothing is known about the fate of HL 3.
There will be no delays – the new part of the Half-Life series will be released on March 23.
Meanwhile, if you waiting for the new VR HL game you can check several free projects to play.