Ok I know first of all achievements are designed to give people a reason he play a game more giving more incentive.
However not all games quite have it as some can have you going for the achievements without experiencing much of the game.
This thread comes from after some one in the Brink froum said
"I've 100% ed the game why would I play it anymore"
Now I prefer to play games for fun hence I'll often play games I feel I want too even older games and will replay them to find stuff and the experience of them, I only normally get rid of games when I feel the fun has gone from them, be it after 1 week or 1 year or more.
So my question is are achievements removing the replayability, are they removing the idea of making your own challange and looking for different things in the game to do ?