Painkiller is one of those games that are so horribly bad that you get that feeling as if it was developed by a few bored students to kill some spare time. And that scenario fits very well with this game...
This game is meant to be some kind of Quake-tribute or something like that, but it doesn't even come close to anything ID Software ever did. Cheap high-resolution graphics are meant to hide away the cheapness of this game, but fail as soon as you press the buttons on your keyboard. Let me state that this game has one of the worst controls I have ever witnessed for a shooter... Nothing seems to be corresponding properly to your actions.
Does anyone remember that also mediocre game Will Rock? This looks frighteningly the same, and if I didn't know better I would have thought this product was from the same developers (with the only difference being that Will Rock is still 10 times better then this junk).
This game is also as stable as a elephant standing on a golfball; I changed the resolution, the game crashed. Any time after that, the screen doesn't show up at all and you are forced to reinstall the entire damn game. And for all those who think of this to be a horror-game, think again. Yeah there is blood involved, but nothing you haven't seen before. I would say that even Half-Life 2 has more gore involved then Painkiller, which is quite pathetic for a self-proclaimed 'horrorshooter' like Painkiller.
I would not suggest buying this game, or even downloading it as it would still be a waste of harddrive-space. Save your money and effort and wait for something that is worth it instead of this fake import-crap.