In reply to ow arm:
How COULD they be? No film of a game can match the game's atmosphere, can it? As you are a passive observer (for 2 hours) rather than being immersed in it (for 40+ hours?). That said, I am not really a gamer so perhaps there are examples where the film bests the game?
I loved the first Silent Hill film, I think it is one of the only genuine HORROR films to have been made in the last 10-15 years, in the sense of "audience unease at having NO IDEA what's going or what might happen next". I didn't have the patience to get far into the game - that's a judgement of myself rather than the game though!