After reading the reviews about TOK on the IMDb board for a long time, it seemed to me that the movie splits the audience in two groups, lovers and haters. And because I'm a Horror-Movie fan, I decided to watch TOK and form my own opinion. OK, and here is my review:
"The Orphan Killer" focuses only on depiction of diverse bloody and gory effects. This fact separates TOK from the big mass of mainstream movies, but on the other hand only through splatter effects a movie will never become a masterpiece. The director should have set more on the plot-quality than on the murder-quality. TOK would have indeed potential for a sequel but without a story there is nothing unique in TOK. I've seen this and that in endless slasher flicks in the past.
There is no horror sound atmosphere in TOK. Every time Marcus grabs a "tool" the Metal Sound rushes in and kills the tense scenery. After a while the music starts to be annoying. In my opinion a creepy atmospheric score would do much better than this nerve killing Metal soundtrack. I felt never entertained throughout the movie. I was rather pushed from one kill to another, which was exhausting and boring. In the end I was glad the movie last scarcely over 80 minutes.
Conclusion: If you've seen various horror flicks in your life and have something to compare with, in addition you're not related to anyone of the film crew so that you are unbiased; you will never rate TOK with ten out of ten stars. I'll give it three stars out of ten. Why three? First because I'm generous and second because I've seen worse in my life.