Valve sound designer publicly mentions codename linked to next Half-Life project

A Valve sound designer referred to “HLX” during a public conference panel, marking the first time a Valve employee has publicly said the codename widely linked to the company’s next Half-Life project. The remark is a small but notable sign that the project exists, though it offers no confirmation of a title, announcement date or release.

Composer and audio artist Mike Morasky mentioned HLX while discussing Valve’s high dynamic range audio systems; fellow panelist David Feise appeared to joke about the slip afterwards. The codename has appeared in Valve engine code since at least 2024. Earlier predictions of a Half-Life 3 announcement, including one tied to the Steam Machine launch, did not come to pass, and Valve watcher Tyler McVicker now doubts an announcement will come this year, despite pointing to increased coding activity.