Fine display of technology... Oh, and it's fun, too.
Lets start out with some things in the game I'm not so fond of. First off, the game has a lot of little puzzles in it, but they're incredibly simple to figure out and seem more like they just wanted to show off their new physics system. That's fine and dandy... once or twice, but after that it just gets kind of annoying. It is an amazing system though, I'll give it that. Secondly, it has tons of loading times... you'll go like 3 minutes and whoops, here's another loading screen. This would be that big of a deal, but sometimes the action just has you on the edge of your seat and then a loading screen pops up and kind of kills the feeling. Other than those two things, I can't really find a fault.
I havn't beaten the game yet, but so far the story has me intrigued, and gave me a very 1984ish feeling near the beginning, which I'm a big fan of. It also has references to the first Half-Life with a couple of your old friends from Black Mesa there to help you out. As a testament to its prequal, your first weapon is a crobar, sure why not? Beat the crap out of boxes guards, and nasty little flying machines, oh and of course headcrabs are back. The gravity gun (again, just seems like they wanted to show off their physics) is pretty cool, pulling random crap and firing it at people, or aliens/zombies. Fun to toy around with, especially when you first get it and play with "Dog". The game seems to give you those necessary breathers in between high stress situations, so it's not like you're constantly running all the way through the game.