This is not a game. This was orginially a demo for Half-Life 2 and the Source Engine. Now for some FAQ:
"Is it good?" Sorta
"WTF! IT IS 39.99 FOR A DEMOZ!!!! VALVE SCAM!?" Click the name and look at the page*.
"Why don't they sell this speratly so I can see if I like Half-life 2?" I really don't know.
This game, because it is a demo, shows you all of the cool things that the engine can do in-game. I like this more because it seems to be filled with action (also not repetitive). It is a good time killer for only 15-30 mins. I give it a 7.5/10.
* If you type in "Lost Coast" the price will be shown as 39.99. If you press on the tile-thing and look the the page for it, it will only be able to be sold with the bundle, that is why it is that much.