The thing is that the plot takes too many turns, so many that the movie ties itself in knots and must resort to a lot of silliness to develop a finale and get out of the whole mess. The early moments are quite involving, showing the nerd-player friendship taking to something scary. Nevertheless, in spite of the good beginning, I figure the two leads have never the chemistry that would explain why they got drawn to one - another, so moments where the viewer would say "OK, everything seems to work" are very rare. The story gets then ridiculous in the end due to many plot twist that poop a film otherwise decent. There's also a cameo of Charlotte Rampling.