Alone in the Dark came out a while ago (or is it still to come on PS3? I'm pretty sure it's already out). I heard some pretty bad things about the game and after playing the demo - which is meant to be showcasing the best parts of the game - I'm not inclined to buy the game.
With the Fracture demo, I was amazed by how smooth the terrain deformation mechanic worked and it's definitely a game to look forward to. Not so sure if it's worth a purchase though, I'm waiting for reviews on that one