Ludwig also cautions that Half-Life 2's Oculus Rift support is "a bit more raw" than the implementation found in Valve's other provisionally Rift-supporting game, Team Fortress 2. Specifically, he mentions slight UI issues and acknowledges that the game's HUD is difficult to read, and encourages developers to let Valve know of any issues they encounter while charging around City 17.
In other Half-Life 2 news, a Linux version of the game has been released as a beta – the client can be downloaded from your Steam Library like other Steam Play-enabled titles. Well, assuming you own Half-Life 2, of course. It's not that beta.