It's enjoyable, but somehow it reminds me of World of Warcraft. You walk around gathering items and artifacts, there is a lot of 'randomness' in the mobs and the world is quite alive but somehow a bit predictable ( As usual with unscripted material).
One thing I like is that storyline characters can die without you getting stuck. Sometimes this happens a bit inadvertently and I end up reloading because since its my first time playing and I don't really want to miss out on anything.
The world is extremely nice and it runs very well on my 7900GT/2048MB DDR RAM/XP Athlon 3200 2.4Ghz with most settings set to max at 1024x786... I'm guessing the game will become more exciting as I progress further into the urban jungle, tired of looking at hills allready...
Interface is buggy, using the map is a nightmare and the PDA where your mission objectives are on isn't always that clear either. Besides that, you always have 24 hours to finish a 'randomly' generated mission. This is probably to give you a sense of time (There is a real day/night cycle!) but since you always get exactly 24 hours, it feels rather fake.
I'm not sure if I'll buy it, it's got Deathmatch, Teamdeathmatch and Capture the artefact (How original). I was hoping it would feature a co-operation mode which would have made this game the most addicting FPS since Doom, but unfortunately, even though it took so many years to complete they completely failed in the multiplayer department. Unless DM and TDM are interesting, but if it doesn't come anywhere near Battlefield I'm not quite interested..
Other than that; the weapons aren't too exciting, I read you can upgrade them, though. The items you can get can be interesting, some have mutated due to the anomalies and you can equip artifacts that have a down and an up side which is adds an RPG side to the game.
The storyline so far has failed to grasp me, apparently you're a stalker who was left behind for dead and you end up on this body truck that is hit by a lightning bolt, truck gets blown up, some stalker finds you and brings you to a trader for whom you'll be doing jobs until your debt is repaid. Not the most catchy storyline but perhaps it'll unfold and become more interesting....