It’s been 19 years since the release of Half-Life 2: Episode 2, and yet the ceaseless clamour for a Valve game with a number ‘3’ in its title continues. And following a swell of reports suggesting Half-Life 3 isn’t just real, its development is well underway, a Valve developer has gone and sent the internet a-chatter all over again by publicly, albeit accidentally, referencing its codename during a livestream.