From what i've heard, the achievements are hard, or at least the collectibles take foreverrrrrrrrrrrrrrrrrrr.
Plus, 100 of the main 1000 is in the original Alice game, which you have to download for 800 points from the marketplace if you didn't get it as a preorder deal.
__________________
I love achievements, Halo Reach online, and reading and writing. And winning.
You used the dreaded word collectibles, 90% of games with collectibles i just play and don't bother even looking for them unless they improve your xp or upgrade your character. Aghhhh might think twice about this now!