Can I just ask what people expect from a half life story? Like it's always been pretty thin on the ground, right?
What was the first game? Experiment goes wrong, aliens notice us and invade, we kill a bunch of them, there's the occasional macguffin, travel to their planet, beat the big bad enemy, boom, mysterious gman puts us in the fridge.
The two expansions seem like the same story from another POV, I have no memory of any important events from either one.
Second game, gman drops us mysteriously back like 20 years later. We kill a bunch of enemies, there's some more macguffin, the vortigaunts were enslaved now they're on our side. There's a bit of intrigue, we beat the local bad guy, the vortigaunts save us.
The following two chapters, apart from having to rescue people, I couldn't tell you what even happens. The world is implied to be so big that you are an insignificant player and you could never hope to grasp what's really gping on, and we never get more than glimpses of what's really happening. It seems more like the idea of a world that leaves open the possibility of more or less anything happening and within which to set games, than a coherent story with structure and tension and stakes, beyond "world in peril" or "friend in peril", which is pretty bog standard stuff.
Like sure we might be a bit invested in Alyx & her dad's stories, but I always assumed people were hyped for sequels because the games play well and have an interesting backdrop. What exactly is the special sauce that mark laidlaw brings? Yes the environmental storytelling was novel and well done, but it's always been so vague because they're so committed to never leaving the players POV, and they spend so little time explaining the actual world.