This game is good.
I'd like to point that out before I start.
You start off with nothing much, as you do in most games. And during the first hour or two of gameplay, you continue to have nothing.
However, when you finally get into the action, and start picking up AK-47's, and other such guns, it becomes gloriously fun, if stupidly difficult.
The weapons are fun, they make satisfying noises when you pull the trigger, they kill as efficiently as they should, and are basically one of the reasons to own the game.
The environments are huge, this is both a good and bad thing. Good because they are huge and not cramped, forcing you to think about what you want to do instead of tearing through typical corridor shooters, and bad because they cause you to take ages to get anywhere.
The "bad-guys" are quite smart, I was flanked a few times whilst firing down on a group of bad guys, while their friends snuck up behind me and shot me in the back of the skull, and they are also expert marksmen.
They are also quite stupid at the same time, charging towards you on the rare occasion, and sometimes even swarming around a door they knew you went through, so you can just shoot them one by one as they run in.
The graphical effects are really nice. In some situations the screen will go yellow or gray, which is really nice when it's subtly changing as you're fighting your way through a fortification.
And the graphics are good. They look nice, and it performs well on older machines, giving it a boost in marks for me.
There are moments where I said to myself: "This is cool", and one of those moments was stumbling across a group of Stalkers where one was playing guitar. I stood there listening to it for a good 5 minutes as it was really nice to listen to and fun to watch.
However. All good games have to have a few down points.
The game is quite hard. Not only is it huge, but it's also really difficult if you don't play it smart. The AI will continually swarm you with overwhelming numbers, and even if you do have any allies, you will be forced to fight on your own most of the time since your allies will die almost immediately.
The game is really boring to start off with, forcing yourself to learn the patterns for the anomalies, or getting killed by an anomaly and having to go all the way back an hours worth of game time because you forgot to save.
The radiation bubbles you have to go into are annoying, forcing you to either keep large quantities of Vodka on you, or large quantities of antidote. The most annoying thing about it is the amount you have to take. You get rid of some radiation and a few minutes later, it's back.
The ending is a little anti-climatic. Not really worth playing through to see.
The last few levels are rediculously hard, forcing you to play with your head and forcing you to run around looking for ammo, sniping. It's got the whole lot. Do-able though.
In conclusion, a good game, which has it's flaws. Would be really nice to have had vehicles in it (it was planned, but scrapped) to cross the huge amount of terrain, and would be much more fun if the game was polished a lot more than it was.