
I've been playing it since its release, and after the first chapter I'd definately say its f**king awesome and heaps better than the original Half-Life, Halo/2 or any other game that claims to be the best. We have a new champion.
The initial escape from city 17 is so realistic and genually scary, as masked combine troops come storming after you. The extended chase sequence on the air boat is incredible, and didn't seem like it would end. The gravity gun was everything I could have hoped for (particularly with saw blades).
Incredible level design, pace, visual effects, action, story and suspense easily make this the best game of the year, possibly ever. 10/10, five stars.