After years of rumors, a Valve developer may have accidentally revealed one of gaming's worst-kept secrets.
For nearly two decades, Half-Life fans have been waiting for Valve to announce the next installment in the beloved franchise. Now, an apparent slip-up from one of the company's developers has reignited speculation that Half-Life 3 could finally be on the horizon.
During a GameSoundCon presentation on October 21, Valve composer and visual effects artist Mike Morasky casually mentioned "HLX," a mysterious codename widely believed to be associated with the long-rumored sequel.
This was somewhat of an eyebrow-raising moment considering that Valve has never officially acknowledged the project's existence.
Valve Developer Casually Drops the HLX Codename
Morasky made the remark during a panel titled "Valve's Approach to an Open and Flexible Audio Engine," where developers discussed the company's audio technology.
While explaining how different games use their own audio systems, Morasky referenced Valve's upcoming multiplayer title Deadlock before unexpectedly bringing up HLX.
"Deadlock has their own version of HDR," Morasky explained. "HLX has its own version, so on and so forth."
Mike Morasky, a developer from Valve, directly mentioned HLX (rumored to be Half-Life 3) during his Q&A session. pic.twitter.com/6ZeaYaD9tb
— Gabe Follower (@gabefollower) October 22, 2026
What made the moment even more interesting was the reaction from fellow Valve sound designer David Feise, who appeared to softly whisper "Nice work" immediately after the remark. Feise later jokingly congratulated Morasky for mentioning HLX only once during the presentation.
This isn't the first time Morasky has had a Freudian slip. In a 2025 interview, he accidentally mentioned "HLX" before correcting himself to say, "Half-Life: Alyx."
Is Half-Life 3 Finally Happening?
The HLX codename isn't entirely new. References to the mysterious project have previously appeared in datamined files from Valve games, including Counter-Strike 2, Dota 2, and Deadlock.
These discoveries have fueled speculation that Valve is developing another mainline Half-Life game using its proprietary Source 2 engine.
The franchise's last major release was Half-Life: Alyx in 2020, a virtual reality prequel that revisited the series' universe. However, fans have been waiting for a direct continuation of Half-Life 2: Episode Two since its release in 2007.
While Morasky's comments suggest HLX is at least a name being used internally at Valve, they don't necessarily confirm that the project is Half-Life 3. Valve has yet to officially announce a sequel, reveal gameplay, or provide a release date.