I suffered through Silent Hill: Revelation. Ugh. Christophe Gans' movie wasn't the adaptation I'd wished it have been, but despite some dumb story changes, it was fairly faithful to the games and did a good job of capturing the tone of the games.
The sequel movie, on the other hand, had a couple familiar-looking characters and settings, but nothing in common with the series. Apparently the surreal and psychological horror elements flew right past the filmmakers, because this is just dumb horror movie fodder painted to look like a chintzy video game.
I guess the best "Silent Hill" movies will forever be Blue Velvet and Jacob's Ladder.