Do you think Valve get a rise out of not telling us anything or looking on the brightside just want to release something as a surprise rather than a long development PR exercise?
Valve has undergone massive transitions as a company and workplace since the original Half-Life 2. A combination of response to the evolving medium of digital products, the taste and goals of the staff, and lessons learned during Half-Life 2.
It started with Gabe being very unhappy with the working conditions behind Half-Life 2, which fit a traditional video game production cycle. By the end staff were burned out and depressed over a lengthy crunch period, and so Gabe overhauled the workplace to more actively encourage freeform development and reduce stressful deadlines/crunch. The consequence was Episode 1 and 2 taking much longer than originally scheduled, as the developers simply took their time and made changes to the project where necessary without the stress of "No, this has to be out by the end of the year".
After Episode 2 the general consensus is a lot of the staff were burned out having worked on Half-Life 2
stuff for so many fucking years. The success of Portal was a natural stepping stone to a new project; Portal 2. Huge production requirements unlike Portal, and a nice refresher for a lot of Half-Life staff eager to work on something new.
Games like Team Fortress 2, DOTA2, and CS:GO offer a similar "sea change", but also act as flagships for Valve's "games as a service" mantra. It comes from a honest place, in my opinion; Gabe and co see "video games" not as isolated, egocentric experiences but communal spaces where people interact with one another and products can evolve over time. Both from developer content and community content. Working out who gets a cut of what, where the transactions are, balancing all the updates, and so on is still a point of concern. But these three games are still massively supported by continuous
free updates and efforts made to expand the content offerings to keep people playing and enjoying. Valve isn't infallible, but they do try to make great games with free support that last for as long as possible.
What that means for the future of
single player games is entirely up in the air. Only the biggest cynics deny Half-Life 3 exists in some form. The numerous leaks, teases, and gossip make it abundantly clear "Half-Life 3" is real. But with Valve that just doesn't mean much. It doesn't tell you who, if anybody, is working on the project
right now. And if people are, how many. What their goals are. The state of the project. How much content has been cut. If there's any forecast to see it finished. And so on. That's just have Valve works; a big pot of ideas and projects and prototypes and
stuff in varying states that may or may not ever see the light of day.
Because of this Valve is coy to give a concrete yes/no on the state of projects and their future. What they say today might not be applicable six months from now. And even if it
seems like Half-Life 3 is never coming, and nobody at all is working on it, all it takes is a break in 12 months from a bunch of staff or are suddenly inspired with ideas to motivate others and bam; it's back.
I do think Valve maybe doesn't appreciate
why people are disappointed at the lack of communication though. While they're entitled to stay silent and not commit to anything, the difference between Episode 3/Half-Life 3 and something like Portal 3 is the latter is a point of desire while the former was more or less announced and "promised". There's been legitimate expectation for Half-Life
something, and Valve isn't a company that has lost a contract, rights to an IP, or struggling financially. So you end up with a bunch of fans going "Yeah okay, there's no Half-Life, but I bought into the episodes when you told me there would be three and ended the second on a cliffhanger, and you guys are still around, so what the fuck is going on?". The years tick by and Half-Life fans rightly get the feeling that Valve just doesn't give a fuck about them; not just because Half-Life doesn't exist any more, but because Valve is insanely coy about any potential future.
All bets are on Left 4 Dead 3 next though. As said, I'm pretty sure our timeline isn't compatible with Half-Life 3.