Valve has added a three-hour long developer commentary to Half-Life: Alyx that delves into how the acclaimed VR adventure came to be. 

The commentary is available to all Half-Life: Alyx owners right now, and features over three hours of audio from the development team "covering every aspect of design." Better yet, the commentary supports subtitles in over 10 languages, so it should be fairly accessible. 

As explained in a trailer uploaded to YouTube by Valve, players can access the commentary by grabbing 'commentary nodes' that appear in-game as floating holograms. The short preview posted online features the dev team chatting about a huge swathe of design elements including combat, character performances, level creation, VR controls, audio, and animation -- so it looks no stone was left unturned. 

Overall, the recordings promise to be incredibly insightful for anybody even vaguely interested in game development, so be sure to check them out if you own the game.