The next entry in the Half-Life series, the VR-only Half-Life: Alyx, hasn't fallen victim to infamous "Valve time" delays.
Be careful how you say that. It's Half-Life "free", not Half-Life "three". If you say that one wrong, people will get very upset.
You'll need a compatible virtual reality headset, of course, but what are the Half-Life: Alyx system requirements?
Half-Life: Alyx gets gameplay trailer and behind-the-scenes video.
It’s not Half-Life 3, but Half-Life: Alyx may be the closest we ever get.