Valve composer and audio designer Mike Morasky let an internal codename slip during a panel at GameSoundCon, an industry conference devoted to game audio, in what fans are treating as the first public confirmation from inside the company that a new Half-Life project exists.
Discussing how Valve implements high dynamic range audio, Morasky said: "Our HDR system is basically that's one of the three pieces that come together to make an HDR that you can easily optimize. And in fact, I think Deadlock has their own version of HDR. HLX has its own version, so on and so forth." The codename "HLX" has appeared in Valve's engine code since at least 2024 and been widely reported as an internal name for the long-rumored next Half-Life project, but it had never been spoken by a Valve employee in public before. A fellow panelist, sound designer David Feise, was caught on video murmuring "nice work" after the slip, then leaning over as the audience applauded to tell Morasky, "Good job — you only said HLX once!"
The moment lands amid years of unresolved speculation about Half-Life 3. A prominent Valve-focused leaker predicted roughly a year ago that a new Half-Life title would be a launch game for Valve's Steam Machine hardware and suggested a 2026 announcement was "likely"; the Steam Machine has since launched without any such announcement, and that same leaker has recently admitted uncertainty about the timeline. Against that backdrop of repeatedly disappointed expectations, an actual Valve employee saying the codename out loud — however accidentally — is being treated by longtime Half-Life watchers as more concrete evidence than anything Valve has offered in years, even if it comes nowhere close to confirming when, or whether, the game itself will ever be announced.