Quite fun indeed. Flaws are large download (1.7 GB), and not too good for 56k'ers (being an online game)
A friend at school told me about this game, and I was like "well I don't have FEAR... :( " and he told me that it was a free seperate download, and I kinda got excited, then I figured that it wouldn't be too good since it was free. Many game developers don't put nearly as much effort into free games, so I was expecting somewhat of a disappointment.
Well, I was wrong. This game is really fun, especially if you're on a budget.
I play Counter-Strike a lot, and the gameplay in this is very very different, so I had difficulty getting used to it, and I'm still not too great at it, since CS is the only FPS for PC I've really played more than a couple of minutes of.
Oh, I almost forgot to mention:
If you have a bad gaming computer, don't worry about it! I figured that my PC would need to be on all minimum settings to play this, but I looked and the graphics were really low, so I bumped up to medium with a few somewhat unnecessary settings on low. The range from low to high quality is very great, because slow computers can still run the game (slow to a certain extent, of course), yet good gaming PC's can get the great eye candy from it. If your PC can run CS 1.6, then it can run this game on mostly low settings at least.
Good game, highly recommended. Happy fragging!