Mike Morasky is not a man who accidentally reveals things. His credits run from Team Fortress 2 and Portal 2 through Left 4 Dead, Half-Life: Alyx and Counter-Strike 2 — decades of keeping secrets inside a studio famous for keeping them. And yet there he was at a GameSoundCon panel, talking about HDR audio, of all things.

The setup was mundane. Morasky was explaining how Valve's games handle high dynamic range sound. Deadlock, the studio's semi-secret hero shooter, has its own version. So, he said, does a project called HLX.

That's the whole thing. Four letters. No logo, no release window, no gameplay. But the room noticed, and so did the developer sitting beside him, who reportedly responded with a dry "Nice work" — the exact tone of a colleague watching someone step on a rake.

For the uninitiated: HLX is the codename that has been glued to Valve's long-rumored Half-Life project in datamines and reports for years. It has never been officially acknowledged. Until, apparently, a sound guy used it as a slide reference.

To be clear, this is not a confirmation. Valve has said nothing. Nobody has announced a game. What happened is that a veteran employee referenced an internal project name in public, which is a very different thing from a reveal — and also precisely the kind of thing that has kept Half-Life 3 chatter alive through two decades of nothing.

The context matters. It has been 19 years since Half-Life 2: Episode 2 ended on that cliffhanger. Since then Valve shipped Portal 2, both Left 4 Deads, Dota 2, Half-Life: Alyx and Counter-Strike 2, and quietly became a storefront operator and hardware manufacturer. It does not need Half-Life 3 to stay in business, which is the uncomfortable truth underneath all of this.

Which is why a slip lands so hard. It isn't evidence of a game. It's evidence of a folder on somebody's desktop. But for a fandom running on Alyx's ending and sheer stubbornness since 2020, a folder is enough.

Reported by IGN, Eurogamer and GamesRadar+, all of whom flagged the moment. Treat everything beyond the four letters as unconfirmed.