Valve hoped to add developer comments to the release version of Half-Life: Alyx, but was unable to do so due to the Covid-19 pandemic. The creators of the game recorded their notes in the last weeks before the release of Alyx, which had to spread the coronavirus around the world – because of this, the developers had to record audio not in the studio, but in their homes.
As a result, in November, Alyx introduced more than three hours of comments in which the authors of the game talk about its design, graphics, animation, rendering and sound. You can listen to the recordings at 147 points of interest, which are indicated in the game with holographic headphones. The developers recommend listening to the comments after completing the game, as they contain plot spoilers.
Half-Life: Alyx was released on March 23, 2020.