Key takeaways
- During a GameSoundCon panel on October 21, Valve composer Mike Morasky casually mentioned HLX, believed by fans to be the internal codename for Half-Life 3.
- Datamining communities have tracked HLX for five years, and McVicker reported in 2025 that the game is playable from start to finish.
- Morasky's comment suggests the codename has become so normalized within Valve that he forgot it was still unannounced to the public.
On October 21, Valve composer Mike Morasky stood on stage at GameSoundCon during a panel about audio and music in Source 2, the company’s game engine. Alongside him were David Feise and Carlye Nyte, both sound designers at Valve. The conversation centered on how Source 2’s flexible sound system operates and connects with other engine components.
When fielding a question about this topic, Morasky responded casually with a remark that would spark widespread fan speculation: “And in fact, I think Deadlock has their own version of HDR. You know, HLX has its own version, so on and so forth.”
Two problems presented themselves immediately. First, Deadlock, Valve’s team-based shooter currently in limited release, is a real, tangible project. HLX, by contrast, remains an internal codename never publicly announced or even acknowledged by the company. To the uninitiated audience member, the reference would have meant nothing. But to those who follow Valve news and the tight community of dataminers who have tracked the company’s activities over several years, HLX carries significant weight.
Spotted by Tyler McVicker, a reporter who covers Valve extensively, the moment caught the room’s shift. Almost immediately after Morasky’s statement, David Feise could be heard offering a low, sarcastic remark: “Nice work.”
What Fans Believe HLX Actually Is
The Codename’s Origins
The Valve community has spent over five years investigating HLX through code analysis, leaked engine files, and developer comments. The widespread consensus among these researchers points to one conclusion: HLX is the internal working title for Half-Life 3, the next mainline entry in the storied science-fiction first-person shooter franchise.
The Gap Between Games
Half-Life 2 released in 2004. Half-Life: Alyx, a VR prequel, launched in 2020. Between those releases and now, fans have speculated endlessly about whether and when a true sequel would emerge. The discovery of HLX references buried in game updates and code repositories offered some of the first concrete evidence that development was happening at all.
Evidence Without Official Confirmation
None of this information came from official channels. Valve has never teased, hinted at, or formally acknowledged any project called HLX. The community’s knowledge derives entirely from detective work, examining data files, comparing changes across updates, and assembling what researchers have found into a narrative of an ongoing project.
Morasky’s Track Record
This is not Morasky’s first time accidentally revealing information about Half-Life projects. In previous instances, he has mentioned working on more than one Half-Life title during public appearances. His only official credit remains Half-Life: Alyx in 2020, making these casual references to additional Half-Life work particularly curious to observers tracking the studio’s output.
The slip-up at GameSoundCon suggests something worth noting: Morasky’s comfort level discussing HLX openly implies the codename exists in a sufficiently normalized state within Valve’s internal culture. Referring to it in conversation feels natural to him, even with cameras present.
Signs of Advanced Development
McVicker reported in 2025 that HLX has reached a significant milestone: the game is playable from start to end. This detail alone places it far beyond the speculative stage. A complete playable build, even in an internal, unpolished state, indicates that core systems, level design, and narrative structure all exist in playable form.
The depth of community documentation surrounding HLX further underscores how much information has accumulated over the years. Fans have built extensive catalogs of mechanics, plotlines, engine features, and other details pieced together from code analysis. Many participants in gaming forums and community spaces openly reference HLX by name in discussions, treating it as a known quantity despite its non-announcement status.
This normalization of the codename within broader gaming discourse may explain how Morasky could mention it so casually. Years of public discussion, combined with years of internal development at Valve, may have erased the distinction in his mind between what is publicly known and what technically remains secret.
Valve’s Likely Response
No immediate official response came from Valve following the GameSoundCon panel. Whether the company will attempt to reframe Morasky’s comment, issue a statement, or simply let the moment fade remains unclear.
Valve has a history of handling news of unreleased projects with silence. The studio rarely issues denials or confirmations. In this case, Valve might attempt to suggest that Morasky misspoke or was referring to Half-Life: Alyx with an incorrect abbreviation. Alternatively, the company could simply decline to engage with the incident, effectively confirming nothing while changing nothing.
Looking Ahead to December
Industry observers have begun speculating about whether this slip-up coincides with preparation for a formal announcement. The Game Awards, held annually in December, represent the most prominent stage where a major publisher like Valve could debut news about Half-Life 3. McVicker himself has noted that Valve owes host Geoff Keighley a trailer, a long-running joke in the community about the company’s relationship with The Game Awards.
Whether HLX becomes Half-Life 3 in an official sense remains dependent on Valve’s own timeline. The slip-up confirms nothing and guarantees nothing. What it does demonstrate is that a project carrying the codename HLX exists in an advanced state of development and that internal Valve staff treat it as an ordinary subject of discussion, something unusual for a project that supposedly remains unannounced.
Source: Kotaku
Frequently Asked Questions
What is HLX?
HLX is an internal codename that fans believe refers to Half-Life 3, based on five years of datamining Valve's games. Valve has never officially announced or acknowledged the project.
How did we know about HLX before this comment?
The Valve community discovered HLX through analyzing code in game updates and engine files. Over the years, fans built extensive documentation about the project through datamining and have openly discussed it in forums.
How advanced is Half-Life 3's development?
According to Tyler McVicker's 2025 report, HLX is playable from start to end, indicating core systems, level design, and narrative structure exist in playable form.
