There is a good review of the Xbox 360 version of Dark Messiah, or "Elements", at GamersMark. It is a little more forgiving with the final score (7.5 out of 10) even if it identifies the areas where the game is lacking:

"I witnessed nine goblins kill themselves as I lay hidden in the shadows above. All I did was kick one into the fire and jump away once its brethren shouted and gave search. Their method of scrutiny impressed nothing on me but their utter stupidity as they all ran up to their charred comrade and every one of them, in succession, caught fire themselves! I reveled in the hilariousness of it all until I realized how cheap it felt. Unfortunately this was not a rare occurrence or a glitch as there were several times I gained experience from a kill that had nothing to do with my actions whatsoever."

The reviewer suggests renting the game first, something that's unfortunately not possible with the PC version.