Finished the game last night. Brilliant game for sure, and kept me interested all the way even though I get bored with many games quite quickly.
Here's a part of a review from UGO I agree with:
"The single-player campaign starts off pretty slow, as you'll be fighting the game's weakest enemies for quite a while, and they're not really much fun to kill. But about an hour into the game, it's made much more interesting by the inclusion of a couple new weapons and the first of the larger enemies. By the time you get halfway through, you will not want to stop playing."
I think it's a joke the pc-gamer gave it a low score, the reviewer needs to find another job