Wonderfully creepy........
The combat givves you a feeling of extreme realism. Granted, it's hard to see how Gordon, cool as he is, could carry around all those gadgets and still run as fast as he does, but I digress. If you don't like digressions, get out of this review right now. Anyway, the combat is just so fun, dodging around through debris with your gun, fighting the forces of evil (Cue Superman Music).
Finally, let me say something about the story line. I'm not actually going to say anything about the story line, you understand, because I wouldn't want to ruin it for you. But you really get attached to the Artificial Intelligence, reminiscent of KOTOR I.
The Multiplayer is possibly the best aspect of this game. I spent a lot of time doing this, and man, there are some hard core players on there. I got my rear kicked all around the maps the first few times, but eventually I got the hang of it. The multiplayer is....amazing....to say the least.
If you like dream sequences, and if you like first person shooters, and above all if you have dream sequences about first person shooters, buy this game. In fact, buy it anyway.