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Valve composer Kelly Bailey's slip of 'HLX' codename reignites Half-Life 3 speculation

During a public panel, Valve audio designer Mike Morasky was recorded saying the internal codename 'HLX,' widely believed to refer to a next Half-Life project, prompting a joking reaction from colleague David Feise. The remark follows a year of unfulfilled predictions, including claims that Half-Life 3 would launch alongside Valve's Steam Machine, which did not materialize. Valve watcher Tyler McVicker now says he doesn't expect an announcement this year, though he notes increased internal coding activity at Valve.

Valve sound designer publicly references HLX project name at GameSoundCon

Valve composer Mike Morasky referred to a project codenamed HLX during a Q&A at GameSoundCon 2026, marking the first public mention of the codename, which has existed in Valve's code since early 2024. Morasky noted that HLX, like Deadlock, has a custom HDR implementation, and a colleague's reaction suggested the reference wasn't intended to be public.